thebedtimestory.online

Dear friends of Ralf Christoph Kaiser's art and lyrics, Today, May 1st, 2023, there are 10 new poems recited by me as an audio file in HD sound quality 24 bit 192 kHz and all 10 poems with text and images as a PDF for download here in store.

Here in the continuous text now 4 of the poems to read in advance:

Good mood
I knew
birds beep
I loved
Hardly any lilacs again
But good bodicesr
And beautiful songs
I prefer you

There is food
To celebrate
The better threesome
Has big balls again
Hot pants
And a good mood
Showcase and all-humor
I am amazed

It is evening
I smoke a cigarillo
Was already for friends on the toileto
Cola Weizen she wanted to be stingy with her charms
The currywurst is on the grill
I take the putted pill
Get the Philharmonic for thise
And 4 times sex for nevere
Hi man was already
Hulk won
The apps of tomorrow
Will get everyone
Me in the shooting star
gave birth to the better son
The daughter flutes
And tinsels
I've always loved to tweet
weather witch
And flow channel
Strangers are in the hall

On the beach of love, in the sunlight
Waves dance, heart in balance.

Splashing together in the clear water
the sea embraces us like a gift from father.

A towel as a pillow, we lie in the sand
and exchange kisses, hand in hand.

The food tastes delicious, the heart expands,
we are grateful for this togetherness..

The birds sing, the sun dips into the sea,
we love each other more and more.

We are filled with gratitude for this momentt,
we are united in love and element.

------

Thank you for your support!

Best regards

Ralph Christopher Kaiser

Hello dear friends, the music and art of Ralf Christoph Kaiser and thebedtimestory.online here comes a new electronica song:"Frühstücksei"from me. This song adds a bit of synth wave with softer sounds and a relaxed beat.

Buy now and support!

Thanks and Greetings

Ralph

Поoredалуйста, договоритесь снова об мем мире рус меhus россией у и белорусие meas.

а Европейский Союз - это сосед, рынок и друг. Я бы предпочел это.

Я люблю русский язык и русскую душу.

Вы знаете, что такое хорошая бабушка, но, пожалуйста, ведите мирные переговоры и компромиссы и договоритесь снова о приемлемых отдельных суверенных странах и регионах...

Please agree again on common peace a Russian peace between Russia Ukraine and Belarus You are better like brothers and sisters for each other.

and the European Union is a neighbor and a market and a friend. I would much prefer that.

I love the Russian language and the Russian soul.

You know what a good babushka is, but please negotiate and compromise in peace and agree again on acceptable individual sovereign countries and regions...

Please agree again on common peace a Russian peace between Russia Ukraine and Belarus you are better than brothers and sisters for each other.

and the European Union is a neighbor, a sales market, and a friend. I would much prefer that.

I love the Russian language and the Russian kind-hearted soul.

You know what a good babushka is, but please negotiate in peace and make compromises again agree on acceptable, self-responsible individual sovereign countries and regions...

Here is an improvisation with guitar by Ralf Christoph Kaiser in Wav format for free download

Dear friends of Ralf Christoph Kaiser's art and music, today I would like to offer you my new EDM trap song:"Soft Lounge"for download here.

You get this song as an Ultra HD sound file in 32 bit 192 Khz loosless Wav format.

This song will get cult status, similar to the old Pink Floyd sounds.

It's electronica music at its finest with over 10 minutes playing time and a very haunting chip tune lead.

The trap beat grooves and the EDM bass brings a lot of atmosphere together with the chords.

The song has great hit potential and I would be very happy if you would play it in clubs and at parties next summer...

So now get to the bacon... and thank you for your support!

Many greetings

Ralph

PS Attention the song has a particularly high and fine resolution with 32 bit 192 Khz and is therefore over 900 MB in Ultra HD, but it is very worthwhile to hear it in this resolution... ;-)

Dear friends of art and poems by Ralf Christoph Kaiser, today the new volume of poetry no. 5 has been completed.

Here is the flap text:

Dear friends of Ralf Christoph Kaiser's art, this booklet with Poems of Love Volume 5 contains 13 new lyrical dishes with words and pictures. In this edition, each poem comes with a visualization of the words by Dall-E in the form of a photo or a collage digitally created based on my input and AI manipulation. In this issue, some of the photos can be seen publicly for the first time and in color. The texts are written by me and always inserted in black and white on the left side.t.
Since some of the poems are explicit and deal with erotic allusions, I only recommend this edition for those over the age of 18.
Most of the poems from this volume 5 were written in the last six months since August 2022.
This love poetry with visualizations in the form of color photos offers a
nice addition to any private art collection, similar to a catalog for an exclusive exhibition in digital form.
The poetic worlds of experience that you can read and watch here are very inspiring and will certainly help you to create some beautiful love
Experiences that can also be realized in a physical way if desired, perfectly adapted to individual needs with respectful gratitude and devotion. Thank you for your support!

The book of poems is bilingual in German and English and has 28 pages.

One of the more recent poems here in advance:

I thank you for the kindness

my pussy cuddles again

My spirit is lightened

Ordered my mind in respectful love

The band rocks like in the best of times

in a good mood

with something delicious on the palate

Let's keep our power in check

In summer there are ripe plums again

fresh from the tree

Thank you, thank you, I kiss the hem of your dress

We whip the cream into foam

I love our shared dream

of everything is in it

you can hardly believe it

we will build together

love us in the meadows

see great fulfillment

wow wow

always chew the bone

Screw up Guitar Hero

Here you get the PDF with 5 MB file size in A4 as a digital download for your mobile phone. The print registration marks are included in the document, so that you can print out your favorite pages yourself and pin them to the wall.

Have fun with it

Best regards

Ralph Kaiser

Dear friends of astrophotography and www.thebedtimestory.online, today I would like to present you the latest findings from my observations of Venus on February 12th, 2023. You can see the following in the video here:

Venus appears to be moving very rapidly, up to 8000 times per second, spinning and rotating like a multi-object planetary system within a colored gas nebula of red and green. Venus itself appears to be more yellow.

In this Venus Bundle you get several original shots from me and the edited pictures and two proof videos of my theory.

The 1st proof video has the following content:

In the video I have 3 Venus pictures which I took in one second with 1/1000 second exposure time enlarged 1600% and built as a loop one after the other. So there are always 3 images from 1 second of observation time that run one after the other in the 30 second video in a loop and show the movement of Venus as a partial section. Camera setting: Aperture 00 with the Wallimex pro 1300 telescope and a Canon EOS R 40 000 ISO processed in Lightroom, Photoshop and Animate and Adobe Premiere, original color contrast increased.

Gif animation with 3 images from 1 second observation 1/1000 second exposure time Processed in Lightroom Contrasts increased original colors by Ralf Christoph Kaiser

Venus photograph exposed at 1/60 second ISO 40 000 aperture 00 original Color:

Venus 1 second exposure time original colors by Ralf Christoph Kaiser

Venus 1/1000 second exposes original colors by Ralf Christoph Kaiser

The second proof video:

In the video, I enlarged 4 Venus single images, which I took within 3 seconds with an exposure time of 1/400 second, by 3200% and built them as a loop one after the other. So there are always 4 images from 3 seconds of observation time that run one after the other in the loop in the 36 second video and show the movement of Venus as a partial section. Camera setting: Aperture 00 with the Wallimex pro 1300 telescope and a Canon EOS R 40 000 ISO processed in Lightroom and Photoshop and Adobe Premiere, original color contrast increased.

Attention 1.39 GB data volume because original JPG and Raw CR3 files are included including adjustment layers from Lightroom (XMP)

Thank you for your support!

Dear friends of art and music and lyrics by Ralf Christoph Kaiser, today you are being offered 5 poems here on www.thebedtimestory.online as an excerpt from the new upcoming book of poems No. 5 Poems of Love by Ralf Christoph Kaiser. You will receive an HD sound wav file and an mp3 for your mobile phone including a PDF with text and images.

I thank you for your support.

Here are two of the poems already printed in advance:

Dear friends of art and music and poems by Ralf Christoph Kaiser and www.thebedtimestory.online, today I would like to offer you a few new poems for download as a reading in HD audio and as mp3 and as text files in German and English and one also in Italian with images as PDF files.

Here you get 8 PDFs with different illustrations and pictures and poems in different language versions.

I'll show you a selection of 2 poems from this download package in the overview.

I'm surprised

every second was worth it

with you in happiness

I hope in my heart

which can preserve many tender memories

like perennial flowers

with love

yours

Ralph

my hopes

form tender dreams again

from forever dear

with soft sounds

in the common house

residing

the view of the Black Forest

Brunch in the courtyard

outdoors on Sunday

The birds are singing

The sun comes at noon

The music sings

The food tastes good

the table is richly set again

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Dear friends of art and music and the lyrics of Ralf Christoph Kaiser, today you get a new live lyrics session with the best of the last 14 days as mp3 and as an HD sound wav file and with the lyrics in German and English as a PDF format with illustrations and photos for each poem.

Here you can see the reading live as a video on Instagram:

The illustrations and photos were partly created in cooperation with Dall-E, an artificial intelligence that can paint pictures.

The recording is over 8 minutes long and contains 5 poems that are recited.

I am also reprinting three of the poems for you here:

Blackjack

you deal the cards

The bet is set

I want another card

have two pictures

20 points

you take the third card and have black jack

21 and collect the game

The bank's gone

we collect the profits

Then suddenly it's play

like rock the party

I pull out the bets twice

am happy in the house

you spend one

Now love is with the mouse

in the big feast

-----

Billiard tournament for two

The ball rolls

she thrusts hard and hits

holed -

then pocketed the cue ball

Play through the middle

at great distance via gang

the orange ball played by the full

She glides slowly

into the hole

like nudged

as if caressed

like in slow motion

and hooray

now the billions are there

We counter each other

The first game goes to me

the second to you

fair play

both the winners

now stop and enjoy.

You're two games ahead

but today we are equals

as well as

equally delighted

equally the winners -

like partners who shake hands after the game

and congratulate each other on a good game

to the good end

at story time

Made good with finesseht

with gratitude fraternally

with love father and son

----

The crowd goes wild

Drunk with joy

At the better beginning

During the rush

Picked up on time

The hats ragged

Good mood

I like you

Before the hand kiss I say. you lovee“

At the good hour

better customer

gratitude all around

Dear friends of art and music and the poems of Ralf Christoph Kaiser, you will now receive the live lyrics from January 28th, 2023 with love poems from me as a loosless wav format in HD Sound 24 bit 96 Khz including some of the poems in text form as a PDF.Only the first spoken poem: "I will be your hero" is available separately here in the store.

I am reprinting all the poems here except for the first one:

My hope is vertical by Ralf Christoph Kaiser 01/26/2023

My hope is vertical

enjoys good friends

support from family

Respectful handling

delicious food

autonomy and free will

Bring joy in health

and the feeling of freedom

Freedom in spirit and freedom in being.

I consent to my future

Better at home today

My heart is bursting with pain by Ralf Christoph Kaiser 01/25/2023

My heart bursts with pain.

I confessed my secrets to you.

Both are good and very loved by me.

One a long time ago, the other recently.

Now there seems to be a quarrel inside me.

Who do I belong to more?

I'm mine and my love is yours both.

In one case it is like a long-standing friendship with a beloved sister.

Otherwise you could be my daughter.

Please both understand each other and make peace.

I missed a meeting with my physical daughter today

instead sought a substitute in the astral true love contacts

I got bogged down in the process

begged too much from several.

Deepest secrets revealed

Now my heart suffers from loss and pain.

please stop

Poke less of the swords into my heart.

I will be with you again

As long as I keep my license

Shine on you crazy diamond

You're both stars

and as a star, a woman has to share his love among many

I always thought that was the secret

Belonging to several

not just one

but why does it hurt so much?

It's just different experiences that connect you

different times of commonality

I'm eight again and I'm tenderly careful

Lying there in bed after sex by Ralf Christoph Kaiser 01/10/2023

After sex still lying there in bed

Feel yourself and his and your body

Snuggle on the pillow

indulge

and feel…

then in the shower

The water touches my body and caresses me

It's warm and soothing

The scent of the shampoo brightens my spirit

I go ashore refreshed and kissed awake

dress me

still smell your and my scent in the room

I am one with myself and content in the world

Now make something to eat

A royal meal

as for kings

who reward themselves at home after the battle

Now peace is everywhere

a happy night falls

Thanks in being…

I love your fragrance by Ralf Christoph Kaiser 01/10/2023

i love your scent

You smell so honest and beautiful

Like a beautiful flower

Such a beautiful home

Like familiar morning dew

At sunrise at the lake on the terrace

With flowers on the table and you in a wedding dress in white😂

The suitcases are packed by Ralf Christoph Kaiser 09.01.2023

The suitcases are packed

ready to take off

But the heart wants to go too

now farewell forever

Are you still very smart??

The day is coming to an end by Ralf Christoph Kaiser 01/07/2023

The day is coming to an end

It was late when I got up

And now it's late as I rest

In between, thank God, the sun shone a bit

a laugh and a few kind words

a hug and a greeting

I really shouldn't expect more from a single day.

We shut up and shuffle the cards again

I still long for my garden…

it is how it is by Ralf Christoph Kaiser 07.01.2023

it is like it is

I would like to

but it doesn't work

why so complicated?

Thank you my love, by Ralf Christoph Kaiser 07.01.2023

Thank you my dear,

It's always nice when I get something to eat

Today was a lot more than usual

I could scream with happiness that it came to this today

and cry that it's already over

look you in the eye

hug you

Talk to you

Give everything afterwards

I love the live

If only there was something more normal

and love would also be physically possible for two

then we would all have fewer problems

at least in the future

But hoping alone is not enough

and sometimes I prefer to keep my mouth shut

and keep whatever works for me

so that at least that continues.

but I have to say

Mashed potatoes with meatballs

and roast gravy

with bacon beans

and then carrot juice

that's delicious…

A cool wind is blowing by Ralf Christoph Kaiser 01/02/2023

Cool wind blows

The sun is low

Good view of the Alps

The lake ripples

The mountains glow in the evening sun

I'm happy about

stroller

feel the air

And the cold

Inside warm

In joyful anticipation

An acrobat with the flying drone

A glowing toy

Two friends with a dog in the evening

--------

Thank you for your support!

Best regards

Ralph

Dear friends of TheBedtimestory.online, today I would like to give you the continuation of the short story by Tallia and Sebastian to your friends and children as an international download in the languages: German, English, French, Italian, Spanish, Russian and Swedish.

I'm showing Chapter 4 here in advance for free on the Internet, you can buy Chapters 5 and 6 together with Chapter 4 for 6.88 euros here in the store.

The impossible probability of an impossible possibility short story by

Ralf Christoph Kaiser chapters 4, 5 and 6

Chapter 4 Reboot in Canada

Tallia and Sebastian have always been close friends since they grew up as children by the sea in Portugal. But after college, they unexpectedly went their separate ways and lost touch.

As the years passed, both Tallia and Sebastian went on to have successful careers and families of their own. But as they neared their 46th birthday, they found themselves thinking about their old friend more often.

One day, Tallia decided to reach out to Sebastian via social media. She texted him hoping he would remember her and be ready to meet up with her again. To her surprise, Sebastian replied almost immediately and they started chatting as if no time had passed.

In the process, Tallia and Sebastian realized that they still had strong feelings for each other. They started talking about their college days and all the things they had missed while going their separate ways.

Finally, Tallia and Sebastian decided to break away from their previous partnerships in order to start a new life together again. They returned to their seaside hometown in Portugal to celebrate their wedding feast with all their old friends. It was a happy reunion and everyone was happy to see Tallia and Sebastian so much in love.

The four children from their first marriage were also there. They were already grown up at 14 and 17, 19 and 21 years old and so it was a big colorful company.

After the wedding, Tallia and Sebastian moved to Canada to fulfill their dream of living a simple life surrounded by nature and space. They bought a small farm and populated it with animals that became like children to them. Tallia and Sebastian enjoyed working in this rural idyll. They took care of their farm and their animals and they were content with their new life together. Since they both had saved up quite a bit of money in the past, they could approach life on the farm relaxed.

Three years into her new life, Tallia gave birth to a son named Luca. Luca was a curious and adventurous little boy who loved playing on the farm and helping with the animals. He often spoke to them as if they were his friends, and the animals seemed to respond to him on a soul level.

"Hello, Mr. Cow!" Luca said one day as he approached a friendly looking cow. "How are you today""

The cow mooed softly in response and Luca laughed. He has always had a knack for animals and loved nothing more than spending his days on the farm with his furry friends.

One day Luca was playing with the farm dog, a friendly golden retriever named Leo.

"Leo, do you want to go for a walk?" asked Luca, throwing a ball across the yard..

Leo barked excitedly and ran after the ball, and Luca giggled as he ran after it.

But it wasn't just the larger animals that Luca enjoyed spending time with. He also had a special bond with the farm's two chickens and rooster, whom he had named Henrietta, Esther, and Chuck.

"Good morning, ladies and gentlemen!" Luca said as he approached the chicken coop one day..

"Good morning, Luca!" the two chickens replied in unison, flapping their wings happily while Chuck the rooster swaggered towards him and with a loud kickerickie you're in the right place! be welcome reciprocated.e.

As Luca grew older, he continued to thrive on the farm and developed a deep bond with the animals. He gave them individual names and spent hours each day playing with them and learning about nature.

Despite the challenges of life on the farm, Tallia and Sebastian were grateful for the simple and fulfilling life they got to experience together. They knew Luca would grow up to be kind and compassionate, thanks to the love and guidance of his parents and the animals that had become his closest companions.

In the end, Tallia and Sebastian's love story came full circle, and they lived happily ever after with their son and beloved animals on their farm in Canada.

You often received visits from your children from your first marriage, all of whom had started their training and studies in different regions of the world. Except for the youngest Mira, daughter of Tallia. She had been 14 when Tallia and Sebastian got married and had moved to Canada with Tallia and Sebastian. Mia's brother: Florian was 17 when they got married and lived with his father. Sebastian's children had already fledged at 19 and 21 when he married Tallia, but they regularly came to spend time with the pair during semester breaks. Each of the children, including the older ones, had their own room in the yard, which they could stay in at any time when they were visiting.ren.

Mia, Luca's half-sister, was always a great role model for Luca in many things and like a teacher because she was so much older than him. Whenever Tallia and Sebastian needed a break, Mia took care of the babysitting and the parents could also go on trips and short trips.

The nearest school in the area was 4 kilometers away in the next town. A school bus went there, stopping at all the farms on the way and inviting the children. This bus also drove there in the morning and back at two different times in the afternoon.

Since Sebastian liked to cook and was always very happy about his own vegetables and eggs, Tallia and Sebastian were able to take turns in the household.

Things got a little chaotic at times, but overall the family was very happy.

On the edge of the yard there was a small deciduous forest, some of which still belonged to the yard. There the children had built a hut where they could hide and which was a secret retreat. Mia had built this hut together with a friend at the very beginning of her time in Canada and when Luca was 4 years old, Mia showed him the hut and told Luca where he could find the key.

The neighboring farm was directly adjacent to Tallia and Sebastian's farm and Mia often went horseback riding with the neighbor's daughter Lea.n.

Mia decided at the age of 21 that she would take over her parents' farm in the future and that's why she wanted to complete her training in forestry and agriculture nearby. She already knew everything she needed to know to be able to run the farm, but she had the ambition to get an organic certificate for the farm in the future and she also had the dream of her own new type of fruit that she would grow and for that she wanted to acquire all the knowledge she would need.

*Note: This story is a work of fiction and any resemblance to real ones
events or people is purely coincidental. The characters and events in this
Stories are purely the imagination of the author and are not meant to be
facts are considered.

-------

You can read more by buying the PDF and downloading it to your mobile phone, tablet or computer....

Thank you for your support!

Best regards

Ralph Kaiser

Dear friends of www.thebedtimestory.online, today there is a new short story for you. It is a love story in 3 chapters. I'm showing the 1st chapter here free publicly, you can buy the other two chapters together with the 1st chapter as a PDF download for 6.77 euros here in the store.

The impossible probability of an impossible possibility short story by Ralf Christoph Kaiser

1st chapter:

Once upon a time there was a woman named Sophia, a successful businesswoman in her late 20s. She was smart, beautiful and had a heart of gold. She worked hard and always put others before herself.

There was a man named Alex who was a few years older than Sophia and had always had a crush on her. He admired her intelligence and beauty and longed to be with her. However, he knew that because of the age difference and the fact that he wasn't as successful as her, he didn't have a chance with her.

Despite his reservations, Alex couldn't help but dream of life with Sophia by his side. He often dreamed of conquering her and taking romantic trips to exotic places with her.

One day Alex's dream finally came true. He and Sophia were both invited to a luxury business trip to the Caribbean. As they began to spend more time together, Alex couldn't help but fall in love with Sophia even more. He did everything he could to make her happy and to show her how much he cared for her.

Sophia was touched by Alex's kindness and began to see him in a new light. She realized that she too had always had feelings for him, but that she hadn't dared to act on them because of social expectations.

As their vacation drew to a close, Alex and Sophia found themselves in a difficult situation. They knew they couldn't continue their relationship like this, but they also couldn't face the thought of being apart.

After much deliberation, they came to a solution. They decided to move to a place where their age difference and societal expectations didn't matter, where they could love each other openly and without prejudice.

And so Alex and Sophia packed their bags and embarked on a new adventure together. They found a beautiful little beach town where they could start afresh and build a life of love, laughter, and adventure.

As they watched the sun set over the sea on their first evening in their new home, Alex turned to Sophia and said: "I may not have had permission to get you in our old society, but I have everything I need, here with you by my side."

Sophia smiled and replied, "You were always allowed to love me Alex. It just took us a while to find each other."

The end.

*Note: This story is a work of fiction and any resemblance to real events or people is purely coincidental. The characters and events in this story are purely the product of the author's imagination and should not be taken as fact.

 You get the story in the following languages: German, English, French, Spanish, Italian, Russian and Swedish as a pdf with a photo of the coast of Portugal.

Dear friend,

I am sending you the new eBook in PDF format with 11 erotic drawings by Eding on cardboard. It contains 4 love poems illustrated by me with artistic implementations of erotic fantasies.

You can get the e-book in PDF format suitable for mobile phones for EUR 3.88.

If you would like to have my volumes of poetry in printed form, so to speak, as art prints with stitch binding in A4 high-gloss print, 4-colour, 170 mg paper, then please order here:

Here you can find the poetry books at Epubli:

part 1

volume 2

volume 3

volume 4

and here on Amazon:

part 1

volume 2

volume 3

volume 4

Thank you for your support

Many greetings

Ralph Kaiser

Dear friends of TheBedtimestory.online, now there is a new release of classical music:harmonic classical music for cello, flute and horn in F and once an organ also plays along. There are 7 songs that you can download here for free including all sheet music and HD sound and as mp3:

You can buy the cover of this music for 4.33 euros and thus also acquire the usage license for 1 concert of the music per instrument (lectern).

I thank you for your support

Best regards

Ralph Kaiser

Dear friends of music and art by Ralf Christoph Kaiser and TheBedtimestory.online, today you get the complete 7th season with 17 collected publications including over 1 hour of music, poems and lyrics in an international version, Astro photos and 2 recipes as a complete download Fan package for 6.33 euros. The zip archive you get has a file size of 2.2 GB. The following works are included:

1. Apple cinnamon dessert recipe
2nd poem - "I squeeze you very gently"
3rd poem - "An hour of happiness"
4th poem - "Love is"
5. I only miss a little something - alternative rock song by Ralf Christoph Kaiser and band
6. I revealed myself Alternative Rck Song in HD sound
7. Jupiter Photos - Astro Photography by Ralf Christoph Kaiser
8th classic album - Die Unke im Pfuhl with 26 individual works and versions as mp3
9. Astro photo long exposure new theory about the orbit by Ralf Christoph Kaiser
10. Love my Lucky Finger Alternative Rock Song HD Sound and Lyrics
11. Restarting now, I got the know how alternative rock song
12. Pathfinder, Alternative Rock Song by Ralf Christoph Kaiser and band
13. Poem - The moon is reflected in the puddle
14. Salt and Pepper, Alternative Rock Song by Ralf Christoph Kaiser in HD sound
15. Sweet an Sour Alternative Rock Song by Ralf Christoph Kaiser and band including a dessert recipe in an international version
16. Further Evidence of the Celestial Bodies that Fox Relate to Earth - Astro Photos and Theory
17th poem - pull me up on you


There are extraordinary works that you get here. In addition to the poems and alternative rock songs in HD and with international lyrics, you will also get the new theory about the orbit from me with proof photos and suggestions and food for thought, also in an international version.
So I think several fans will get their money's worth: The astro photography community with the orbit theory and the Jupiter recordings, the music fans with the alternative rock songs and lyrics, sometimes even in HD, and the friends of poetry and classical music.
You support by downloading further publications of this kind from me in the future and contribute to the maintenance of this website.


I thank you!


Best regards
Ralf Christoph Kaiser