Geographic Variation in the North American Cyprinid Fish, Hybopsis gracilis

by Leonard J. Olund; Frank B. Cross

1856. Researches upon the cyprinoid fishes inhabitating the fresh waters of the United States of America, west of the Mississippi Valley, from specimens in the museum of the Smithsonian Institution. Proc. Acad. Nat. Sci. Philadelphia, 8:165-213.

1858. Fishes. In Explorations and surveys for a railroad route from the Mississippi River to the Pacific Ocean. War Dept., Washington. 1-368.

Graham, I. D.

1885. Preliminary list of Kansas fishes. Trans. Kansas Acad. Sci., 9:69-78.

Hankinson, Thomas L.

1929. Fishes of North Dakota. Papers of the Michigan Acad. Sci., Arts and Letters., 10:439-460.

Harlan, James R., and Everett B. Speaker.

1951. Iowa fish and fishing. Iowa Cons. Comm. 1st edition. 1-237.

1956. Iowa fish and fishing. Iowa Cons. Comm. 3rd edition. 1-377.

Harrison, Harry M., and Everett B. Speaker.