American Historical Linguistics, July 17–18, 2006, at the 52nd InternationalCongressofAmericanists, Seville, Spain. [2007-09-19]. (原始内容存档于2011-07-26). 引文使用过时参数coauthors
causes of the disappearance and maintenance of languages in the nations of America: papers presented at the 49° InternationalCongressofAmericanists, Quito
Proceedings and selected papers of the InternationalCongressofAmericanists. Chicago, Illinois: University of Chicago Press. 1952: 273–84. OCLC 180504894