平原印第安人手语(英語:Plains Indian Sign Language,PISL;法語:Langue des Signes Indienne des Plaines;西班牙語:Lenguaje de Signos Indio de las Llanuras),又称平原手语、平原手势谈话(Plains
99701): Alaska Native Language Center, 1981. Kaplan, Lawrence. Iñupiaq Phrases and Conversations. Fairbanks, AK: Alaska Native Language Center, University
[2009-05-16]. (原始内容存档于2012-10-15). Lakota Language Consortium. [2016-07-28]. (原始内容存档于2011-05-01). About the Lakota Language Program. Red Cloud Indian School.