Of the twenty volumes and portfolios comprising The North American Indian, these eight focus on The Great Plains and Plateau regions:

Vol. III, 1908. Teton, Oglala and Brule Sioux, Yanktonai, and Assiniboin.
Vol. IV, 1909. Apsaroke (Crow) and Hidatsa.
Vol. V, 1909. Mandan, Arikara and Atsina.
Vol. VI, 1911. Piegan, Cheyenne and Arapaho.
Vol. VII, 1911. Yakima, Klickitat, Kutenai, Flathead, Kalispel, Spokan, Nespilim, and Kittitas.
Vol. VIII, 1911. Nez Perce, Walla Walla, Umatilla, Cayuse, Wishham, and Chinook
Vol. XVIII, 1928. Chepewyan, Cree and Sarsi.
Vol. XIX, 1930. Wichita, Southern Cheyenne, Oto, and Comanche.