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© SSAR (Society for the Study of Amphibians and Reptiles)

Ashton, R.E.; Edwards, S.R.; Pisani, G.R.
1976
Endangered and threatened amphibians and reptiles in the United States.
SSAR (Society for the Study of Amphibians & Reptiles), Lawrence, Kansas. 65 pp. (Herpetological Circulars no. 5).