Bibliography
- Aoki, Haruo. (1966). Nez Percé vowel harmony and proto-Sahaptian vowels. Language, 42, 759-767.
- Aoki, Haruo. (1970). Nez Percé grammar. University of California publications in linguistics (Vol. 62). Berkeley: University of California Press. ISBN 0-520-09259-7.
- Mithun, Marianne. (1999). The languages of Native North America. Cambridge: Cambridge University Press. ISBN 0-521-23228-7 (hbk); ISBN 0-521-29875-X.
- Rigsby, Bruce. (1965). Continuity and change in Sahaptian vowel systems. International Journal of American Linguistics, 31, 306-311.
- Rigsby, Bruce; & Silverstein, Michael. (1969). Nez Percé vowels and proto-Sahaptian vowel harmony. Language, 45, 45-59.
- Rude, Noel. (2012). Reconstructing Proto-Sahaptian Sounds. University of British Columbia Working Papers in Linguistics, Vol. 32, pp. 292-324. Papers for the Forty-seventh International Conference on Salish and Neighbouring Languages, Cranbrook, British Columbia, Canada, August 3-5, 2012, edited by Joel Dunham, John Lyon & Natalie Weber.
Read more about this topic: Sahaptian Languages