Bibliography
Behler, John L. 1988. The Audubon Society pocket guides, familiar reptiles and amphibians, North America.
Alfred A. Knopf, New York.
Conant, Roger, and Joseph T. Collins. 1991. The Peterson field guide series, a field guide to reptiles and
amphibians, eastern and central North America, 3rd edition. Houghton Mifflin Company, Boston.
Hart, Thomas, and Roy Ickes. 1997. Laboratory manual for field biology. Washington and Jefferson College,
Washington, PA.
Matson, Timothy O. 1997. An introduction to the natural history of the frogs and toads of Ohio.
Photo Credits
Figures 2-6 by Timothy Matson and found at
http://www.cmnh.org/research/vertzoo/frogs/frogs.html.Figure 1 based on drawings by Roger Conant and Joseph T. Collins from Peterson field guide series, a field guide to reptiles and amphibians, eastern and central North America, 3rd edition.
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