Parker, Samuel.
(1) Journal of an Exploring Tour Beyond the Rocky Mountains ... in the years 1835, 36, and 37. Ithaca, N. Y., 1842.
Pike, Z. M.
(1) An Account of Expeditions to the Sources of the Mississippi, and Through the Western Parts of Louisiana. Philadelphia, 1810.
Plank, Pryor.
(1) The Iowa, Sac and Fox Indian Mission. In Transactions of the Kansas State Historical Society, 1907-1908. Vol. X. Topeka, 1908.
Prescott, P.
(1) Manners, Customs and Opinions of the Dacotahs. In Schoolcraft, (3), IV.
Radin, Paul.
(1) The Winnebago Tribe. In Thirty-seventh Annual Report of the Bureau of American Ethnology. Washington.