1. A history of the New York Iroquois, now commonly called the Six Nations / by William M. Beauchamp. S.T.D. Beauchamp, W. M. (William Martin), 1830-1925 Albany : New York State Education Department, 1905. Book Online
2. Wokas, a primitive food of the Klamath Indians / by Frederick Vernon Coville, honorary curator, Division of Plants. Coville, Frederick V. (Frederick Vernon), 1867-1937 [Washington] : [Goverment Printing Office], [1904] Book Online
3. The Eskimo tribes : their distribution and characteristics, especially in regard to language : with a comparative vocabulary, and a sketch-map / by Dr. H. Rink, late director of the royal Greenland board of trade and formerly royal inspector of South Greenland. Rink, H. (Hinrich), 1819-1893 Copenhagen : C.A. Reitzel, 1891. Book Online