Noland, W. E.
1951. The hydrography, fish, and turtle population of Lake Wingra. Trans. Wisconsin Acad. Sci. Arts Letters, 40(2):5-58, 1 map, April 27.
Nopcsa, F. B.
1926. Heredity and evolution. Proc. Zool. Soc. London, 1926, pp. 633-65, 9 figs.
Okada, Y.
* 1930. Notes on the herpetology of the Chichijima, one of the Bonin Islands. Bull. Biogeog. Soc. Japan, 1(3):187-91 (Japanese), pp. 193-94 (English summary) (from Biol. Absts.).
1938. A catalogue of vertebrates of Japan. Maruzen Co., Ltd., Tokyo, iv + 412 pp.
* Oken, L.
1816. Lehrbuch Zoologie (Naturgeschichte III, 2). Leipzig, xvi + 1270 pp. (from Conant and Goin, 1948:18).
Oliver, J. A.