[Song from the Earth: American Indian Painting's] greatest weakness lies in its provincial assumption that no Indian painting was important unless it was created by an Indian who was a resident of, or was schooled or taught in the Southwest. No mention is made of Angel De Cora, the most influential Indian artist, teacher, and spokesman for Indian art at the beginning of the century. She was a Winnebago Indian from Nebraska. Forgotten also are the Indian artists who actively contributed to WPA art programs during the depression years. (p. 58)

John C. Ewers, in The American West (copyright © 1977 by the American West Publishing Company, Cupertino, California), March/April, 1977.

One must add [Song from the Earth: American Indian Painting] to Dorothy Dunn's American Indian painting of the Southwest and Plains area … as an antidote to the latter's parochial taste and outlook regarding the uniqueness of "modern" Indian art...