แม่แบบ:R:Upson & Longacre 1965
Upson, B. W.; Longacre, Robert E. (October 1965), chapter Proto-Chatino phonology, in International Journal of American Linguistics, volume 31, issue 4, DOI:, JSTOR 1264039, pages 312–322
Upson, B. W.; Longacre, Robert E. (October 1965), chapter Proto-Chatino phonology, in International Journal of American Linguistics, volume 31, issue 4, DOI:10.1086/464861, JSTOR 1264039, pages 312–322