Wissler, Clark, 1870-1947. Population changes among the northern Plains Indians. - New Haven, Conn.: Human Relations Area Files, 1970. - 20 p. ; 25 cm. - Yale University publications in anthropology ; no.1. . Reprint of the 1936 ed. Bibliography: p. 19-20. Subjects--Topical Terms: Indians of North America--Great Plains--Census.