Zepeda, Ofelia. 1982. "A Papago Grammar." Tucson: University of Arizona Press.

Zenk, Henry B. 1990. "Siuslawans and Coosans." In Northwest Coast, edited by Wayne Suttles. 7: 572-579. Smithsonian Institution, Washington:.

Zeisberger, D. 1888. "Essay of An Onondaga Grammar." 11, 12, 12, 12: 442-453, 65-75, 233-239, 325-340.

Zavala, R. Inversion and Other Topics in the Grammar of Olutec (Mixean). PhD thesis, University of Oregon, 2000.

Yumitani, Y. A Phonology and Morphology of Jemez Towa. PhD thesis, University of Kansas, 1998.

Young, Robert W. and Sr., William Morgan. 1987. "The Navajo Language: A Grammar and Colloquial Dictionary." Albuquerque: University of New Mexico Press.

Woodbury, Richard B. 1979. "Zuni Prehistory and History To 1850." In Southwest, edited by Alfonso Ortiz. 9: 467-473. Smithsonian Institution, Washington:.

Wood, Esther and Leanne Hinton. 2002. "A Report On George Grekoff's Collection of Chimariko (and Other) Materials." In Proceedings of the Meeting of the Hokan-Penutian Workshop, 11: 109-114. Berkeley: University of California.

Wolff, H. 1952. "Osage." In International Journal of American Linguistics, 18 , no. 2, 4: 63-68, 231-237.

Wolfart, H. C. 1996. "Sketch of Cree, An Algonquian Language." In Languages, edited by Ives Goddard. 17: 390-439. Washinton, D.C.: Smithsonian Institution.