1958. A checklist of the freshwater fishes of Canada and Alaska. Royal Ontario Mus., 1-30.
Shoemaker, Hurst H., Quentin H. Pickering and Leonard Durham.
1951. The occurrence of the flathead chub, Platygobio gracilis, in Tennessee. Jour. Tennessee Acad. Sci., 24(1):84.
Simon, James R.
1946. Wyoming fishes. Wyoming Game and Fish Dept., 1-129.
Slastenenko, E. P.
1958. The distribution of freshwater fishes in the provinces and main water basins of Canada. Bull. Shevchenko Sci. Soc., 1(6):1-11.
Smith, C. Lavett.
1958. Additional Pleistocene fishes from Kansas and Oklahoma. Copeia. 3:176-180.
Suckley, George.