Washington: Government Printing Office, 1941. — XII, 183 p. — (Memoirs of the National Academy of Sciences, Vol. XXIII, Second Memoir).
The following grammar is the result of the joint work of the authors. While the udnersigned is alone responsible for the presentation and arrangement of the material, the detailed information was given by Miss Deloria, a graduate of Teachers College, New York City, whose family name is des Lauriers. Her parents were Yankton but she has grown up among the Teton of Standing Rock.