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Will you buy me a coffee?

I'm very happy if this site has helped you in your research

Its use is free for every visitor, regardless of how much data is accessed.

However, maintaining this website and acquiring research materials does involve costs..

But you are welcome to support me....

Buy me a coffee and say something nice..

This link leads to "Buy Me a Coffee," where you can enter any amount and leave a message.

..or simply donate something!

This link leads to PayPal, where you can enter any amount.

Thank you very much

Manfred Stammler