Dictionary Alaska Native Language Center. ISBN 0-933769-21-0 S.A. Jacobson (2000). A Practical Grammar of the Central Yup'ik Eskimo Language. Fairbanks: Alaska
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