A field guide to western reptiles and amphibians : field marks of all species in western North America, including Baja California /
text and illustrations by Robert C. Stebbins ; sponsored by the National Audubon Society and National Wildlife Federation.
- 2nd ed. rev.
- Boston : Houghton Mifflin, 1985.
- xiv, 336 p. : ill. ; 19 cm.
- The Peterson field guide series ; 16 .
- The Peterson field guide series ; 16. .
Reptiles--Identification.--North America Reptiles--Identification.--West (U.S.) Amphibians--Identification.--North America Amphibians--Identification.--West (U.S.)