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3. Boas, Kroeber, Lowie: American Anthropology Comes of Age;Beals;J. Anthropol. Study Hum. Movement,2000
4. Beckham, Stephen Dow, 1971. Requiem for a People: The Rogue Indians and the Frontiersmen. University of Oklahoma Press, Norman (reprinted 1996, Oregon State University Press, Corvallis).