Waldemar Jochelson, The Mythology of the Koryak, The American Anthropologist, Vol. VI, pp. 415-416, 421-425. 1904.

W.D. Dall, Masks, Labrets, and Certain Aboriginal Customs, Third Annual Report of Bureau of Ethnology, pp. 46-147. Washington, 1884.

O.T. Mason, Migration and the Food Quest, pp. 275-292. Washington, 1894.

McGee and Thomas, Prehistoric North America, pp. 51, 58-82. Philadelphia, 1905. Ratzel, History of Mankind, Vol. I, pp. 5-7, 145-147, 153-154. London, 1896-1898.

Ripley, Races of Europe, map p. 42, pp. 43-44. New York, 1899.

Ratzel, History of Mankind, Vol. I, p. 7. London, 1896-1898.

Tylor, Anthropology, pp. 86-87. New York, 1881.

E.J. Payne, History of the New World Called America, Vol. II, pp. 554-555. Oxford, 1899.

Justus Perthes, Taschen Atlas, p. 17. Gotha, 1905.

Carl Ritter, Comparative Geography, pp. 188-212. Translated by W.L. Gage, Philadelphia, 1865. N.S. Shaler, Nature and Man in America, pp. 11-18, 151-165. New York, 1896.