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1947. The reptiles and amphibians of eastern central Illinois.

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1955. Notes on Mississippi amphibians and reptiles. Amer. Midl.

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1957. A distributional summary of the herpetofauna of Indiana and Illinois. Amer. Midl. Nat., 58(2):341-51, 13 figs.

SNEDECOR, G. W.

1956. Statistical methods. Iowa St. College Press, Ames, Iowa, 5th ed., xiii + 534 pp.

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1954. Amphibians and reptiles of western North America. McGraw-Hill Book Co., New York, vii + 528 pp., 104 pls., 52 figs.

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1954. Additional records of amphibians and reptiles in southern Illinois. Amer. Midl. Nat., 51(1):311-12.

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1944. Notes on the American soft-sh.e.l.l turtles, with special reference to _Amyda aga.s.sizii_. Bull. Mus. Comp. Zool., 94(1):1-75 pp., 30 pls., 10 tables, May.

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1917. A check list of North American amphibians and reptiles.

Harvard Univ. Press, Cambridge, Ma.s.s., 1st ed., iv + 125 pp.

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