Key to the herpetofauna of the continental United States and Canada - Powell, Robert 1948- (University Press of Kansas, 2019)
Revised edition of: A key to amphibians and reptiles of the continental United States and Canada. 1998
Keywords: Amphibians / United States / Identification; Reptiles / United States / Identification; Amphibians / Canada / Identification; Reptiles / Canada / Identification; Amphibians; Reptiles; Canada; United States; Field guides