Gregg, Josiah.

(1) Commerce of the Prairies. New York, 1844. 2 vols.

Grinnell, George Bird.

(1) Early Cheyenne Villages. In American Anthropologist, vol. 20, No. 4, Oct.-Dec., 1918.

(2) The Fighting Cheyennes. New York, 1915.

(3) Blackfoot Lodge Tales. New York, 1892.

Handbook of American Indians.

Bulletin 30, Bureau of American Ethnology, Washington. Part 1, 1907; Part 2, 1910.

Harmon, D. W.

(1) A Journal of Voyages and Travels in the Interiour of North America. Andover, 1820.