See E. Sapir in Selected Writings in Language, Culture, and Personality, ed. by D. G. Mandelbaum (1949); J. A. Mason in Handbook of South American Indians, ed. by J. H. Stewart (Vol. 6, 1950); F. Boas, Handbook of American Indian Languages (1911–38, repr. 1969); J. Sawyer, ed., Studies in American Indian Languages (1971); E. Matteson et al., Comparative Studies in Amerindian Languages (1972); L. and M. Campbell, The Languages of Native America (1979); J. Greenberg, Language in the Americas (1987).
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.