Conant, Roger. 1951.
The Reptiles of Ohio
2d ed., with revisionary addenda. Notre Dame, IN: University of Notre Dame Press. 284 pp.


Davis, Jeffrey G., and Scott A. Menze. 2000.
Ohio Frog and Toad Atlas
Miscellaneous Contribution No. 6. Columbus, OH: Ohio Biological Survey. 23 pp.


Davis, Jeffrey G., and Scott A. Menze. 2002.
In Ohio's Backyard: Frogs and Toads
Columbus, OH: Ohio Biological Survey. 140 pp.


Pfingsten, Ralph A., and Floyd L. Downs, eds. 1989.
Salamanders of Ohio
Bulletin, new series (7) 2. Columbus, OH: Ohio Biological Survey. 315 pp.




Pfingsten, Ralph A., and Timothy O. Matson. 2003
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Miscellaneous Contribution No. 9. Columbus, OH: Ohio Biological Survey. 32 pp.