A field guide to reptiles and amphibians : eastern and central North America Roger Conant and Joseph T. Collins ; illustrated by Isabelle Hunt Conant and Tom R. Johnson.

מאת Conant, Roger, 1909-2003
יצא לאור 1991

Peterson field guide to reptiles and amphibians of eastern and central North America Robert Powell, Roger Conant, and Joseph T. Collins ; illustrated by Isabelle Hunt Conant, Tom R. Johnson, and Errol D. Hooper Jr. ; maps by Travis W. Taggart.

מאת Powell, Robert, 1948-, Conant, Roger, 1909-2003, Collins, Joseph T.
יצא לאור 2016