The Pterosaurs: From Deep Time
DAVID UNWIN, Ph.D.,is the curator for fossil reptiles     and birds, Museum of Natural History, Humbolt University, Berlin. A world     renowned, leading authority on pterosaurs, he has published extensively in     scientific publications on their wing membranes, walking ability, and the     history of the group. He lives with his wife Natalie Bakhurina—also     an internationally respected pterosaur expert—in Berlin.