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Ditmars, Raymond L. 1907 — The reptile book. Doubleday, Page, pp. i-xxxii -|- 

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1929— Serpents of the eastern states. Bull. N. Y. Zool. Soc, vol. XXXII, 



no. 3, pp. 82-120, figs. 1-33, pi. I. 



1936 — The reptiles of North America. Doubleday, Doran pp. i-xvi -|- 1-476, 



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Dunn, E. R. 1934 — Systematic procedure in herpetology. Copeia, 1934 (4), pp. 



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DuRY, Charles. 1910a — Young snakes taking refuge in the mother's mouth in time 

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1910b— Ibid., p. 73. 



Dury, Ralph. 1932a — Notes on copperhead. Agkistrodon mokasen (Beauvois). Proc. 

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1932b — Recent acquisitions to the department of herpetology. Proc. Jun. Soc. 



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1934 — Snakes of the Cincinnati region. Zool. Soc. Cincinnati, Quarterly, vol. I, 



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Dymond J. R. and F. E. J. Fry. 1932 — Notes on the breeding habits of the green 

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Eigenmann, C. H. 1896 — The inhabitants of Turkey Lake: Testudinata. Proc. Ind. 

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EvERMANN, Barton Warren and Howard Walton Clark. 1920 — Lake Maxin- 

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Force, Edith R. 1930 — The amphibians and reptiles of Tulsa County, Oklahoma, 

 and vicinity. Copeia, 1930 (2), pp. 25-39. 



Gadow, Hans. 1901 — Amphibia and reptiles. Macmillan & Co., pp. i-xiii -\- 1-668, 

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Carman, H. 1892 — A synopsis of the reptiles and amphibians of Illinois. Bull. Illinois 

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Gloyd, Howard K. 1928 — The amphibians and reptiles of Franklin County, Kansas. 

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1932 — The herpetological fauna of the Pigeon Lake region, Miami County, 



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1934 — Studies on the breeding habits and young of the copperhead, Agkistrodon 



mokasen Beauvois. Pap. Mich. Acad. Sci. Arts and Lett., vol. XIX, pp. 



587-604, figs. 18-9. pis. LXXVII-LXXIX. 



1935 — The cane-brake rattlesnake. Copeia. 1935 (4), pp. 175-8. 



Gloyd, Howard K. and Roger Conant. 1934 — The broad-banded copperhead: A 

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 no. 283, pp. 1-5, pi. I. 



