Geographic Variation in the North American Cyprinid Fish, Hybopsis gracilis

by Leonard J. Olund; Frank B. Cross

1933. Fishes of South Dakota. South Dakota Dept. Game and Fish. 1-87.

Cleary, Robert E.

1956. The distribution of the fishes of Iowa. In Iowa fish and fishing, by James R. Harlan and Everett B. Speaker. 3rd edition. Iowa Cons. Comm. 267-324.

Clemens, W. A., A. MacDonald, H. McAllister, A. Mansfield and D. Rawson.

1947. The fishes of Saskatchewan. In Report of the Royal Commission on the fisheries of the province of Saskatchewan. 1-131.

Cockerell, Theodora D. A.

1927. Zoology of Colorado. Univ. Colorado, Boulder. 1-262.

Cope, E. D.

1864. Partial catalogue of the cold-blooded Vertebrata of Michigan. Proc. Acad. Nat. Sci. Philadelphia, part 1:276-285.

1865. Partial catalogue of the cold-blooded Vertebrata of Michigan. Proc. Acad. Nat. Sci. Philadelphia, part 2:78-88.