Dr. Richard G. Zweifel · R Z · Richard G · Richard Zweifel
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Encyclopedia of Reptiles and Amphibians, Second Edition | 978-0-12-178560-4 (0-12-178560-2) | 1998 | Harold G. Cogger | |
| Reptilien & Amphibien | 978-3-572-01369-2 (3-572-01369-0) | 2002 | " |