AGASSIZ, L.
1854. Notice of a collection of fishes from the southern bend of the Tennessee River, in the state of Alabama. Amer. Jour. Sci. and Arts, 17(50):297-308 and 353-365.
BAILEY, REEVE M.
1951. A check-list of the fishes of Iowa, with keys for identification. In Iowa fish and fishing, by James R. Harlan and Everett B. Speaker. 1st edition. Iowa Cons. Comm. 185-237.
1956. A check-list of the fishes of Iowa, with keys for identification. In Iowa fish and fishing, by James R. Harlan and Everett B. Speaker. 3rd edition. Iowa Cons. Comm. 325-377.
BECKMAN, WILLIAM C.
1952. Guide to the fishes of Colorado. Univ. Colorado Mus., 11:1-110.
BRYANT, FRANCIS T.
1858. Report of Francis T. Bryant to Col. J. J. Abert, Chief, Corps Top. Engs., USA. In Executive Documents of the Senate of the U. S., First Session, 35th Congress, and Special Session of 1858. 3:455-481.
CHURCHILL, EDWARD P., and WILLIAM H. OVER.
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.
1879. A contribution to the zoology of Montana. Amer. Nat., 13:432-441.
COPE, E. D., and H. C. YARROW.
1875. Report upon the collections of fishes made in portions of Nevada, Utah, California, Colorado, New Mexico, and Arizona, during the years 1871, 1872, 1873, and 1874. In Report upon geographical and geological explorations and surveys, west of the one hundredth meridian, in charge of First Lieut. Geo. M. Wheeler. Volume V, Zoology. 635-703.
CRAGIN, F. W.
1885. Preliminary list of Kansas fishes. Bull. Washburn Lab. Nat. Hist., 1(3): 105-111.
CROSS, FRANK B., WALTER W. DALQUEST and LEO LEWIS.
1955. First records from Texas of Hybopsis gracilis and Notropis girardi, with comments on geographic variation of the latter. Texas Jour. Sci., 7(2):222-226.
CUVIER, M. LE BON and M. A. VALENCIENNES.
Geographic Variation in the North American Cyprinid Fish, Hybopsis Gracilis · The Wunder Library — complete classics, free to read, with narration.