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All data on this website are protected by international copyright laws.

The main copyright holder is Dr. Martin Zuther, while some data appear with kind permission by Bettina von Reden and Melanie Lauble.

The background image „Fabric Plaid“ was created by James Basoo (Subtle Patterns).

Please ask for permission before you use any data. Use of a term on my website may not be regarded as affecting the validity of any trademark or service mark.