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Roger Conant and Joseph T. Collins ; illustrated by Isabelle Hunt Conant and Tom R. Johnson
Houghton Mifflin 1991 3rd ed The Peterson field guide series 12
hbk. , pbk.
Available at 1 libraries
Howard K. Gloyd and Roger Conant
Society for the Study of Amphibians and Reptiles 1990 Contributions to herpetology no. 6
