1. Ahler, Stanley A. 1971 Projectile Point Form and Function at Rodgers Shelter, Missouri.Missouri Archaeological Society, Research Series8. Columbia, Missouri.
2. Dodge, Richard I. 1959Our Wild Indians: Thirty-three Years' Personal Experience among the Red Men of the Great West. New York: Archer House (re-print of 1882 edition).
3. Fletcher, Alice C., and Francis La Flesche 1911 The Omaha Tribe.Bureau of American Ethnology, Annual Report27.
4. Frison, George C. 1974 Archeology of the Casper Site.InFrison, George C., editor,The Casper Site: A Hell Gap Bison Kill on the High Plains. New York: Academic Press.
5. Grinnell, George B. 1962The Cheyenne Indians. New York: Cooper Square (reprint of the 1923 edition).