| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Amphibians of Oregon, Washington, and British Columbia | 978-1-55105-566-4 (1-55105-566-X) | 2006 | Chris Thoms |
| Amphibians of Oregon, Washington and British Columbia: A field identification guide | 978-1-55105-073-7 (1-55105-073-0) | 1996 | |