Paul van Rijckevorsel dipteryx at FREELER.NL
Mon Feb 23 12:13:33 CST 2004

Apparently the topic remains much alive:

Only thing to be unclear is when the book was first published. 
Cannot have been earlier than 1957 (Nachwort) but should be before the French edition of 1962. The third and fourth printing of the German book are offered for sale, with 1962 as printing date (also by Gustav Fischer).

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