Brattstrom, B. H.
1954. The fossil pitvipers (Reptilia: Crotalidae) of North America. Trans. San Diego Soc. Nat. Hist., 12(3):31-46, 2 figs.
Brown, A. E.
1903. Texas reptiles and their faunal relations. Proc. Acad. Nat. Sci. Philadelphia, pp. 543-558.
Carpenter, C. C.
1958. Reproduction, young, eggs, and food of Oklahoma snakes. Herpetologica, 14:113-115.
Carr, A. F., Jr.
1936. The gulf-island cottonmouths. Proc. Florida Acad. Sci., 1:86-90.
Carr, A. F., Jr., and Carr, M. H.
1942. Notes on the courtship of the cottonmouth moccasin. Proc. New England Zool. Club, July 18, 20:1-6.