| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| A Key to Amphibians and Reptiles of the Continental United States and Canada | 978-0-7006-0929-1 (0-7006-0929-6) | 1998 | Robert Powell · Joseph T. Collins |
| Key to the Herpetofauna of the Continental United States and Canada | 978-0-7006-2890-2 (0-7006-2890-8) | 2019 | Robert Powell · Joseph T Collins |
D,. H.. · D. J. · E. D. · E.H. · E. J. · Errol D. Hooper · J. H. · J. Hooper