Additional papers related to Elaine and Charles Eastman and other family members are housed at Jones Library, Amherst, Mass.; Forbes Library, Northampton, Mass.; Dartmouth College, Hanover, New Hampshire; and Hampton University, Hampton, Virginia. Papers of Henrietta Martindale are in the Katherine Martindale Family Papers, Wisconsin Historical Society, University of Wisconsin--La Crosse Area Research Center, La Crosse, Wisconsin.

The Life of Elaine Goodale Eastman by Theodore D. Sargent (2005)

"The Estrangement of Charles Eastman and Elaine Goodale Eastman" by Theodore D. Sargent and Raymond Wilson, South Dakota History, Vol. 40 No. 3 (Fall 2010)

"Finding Oneself through a Cause: Elaine Goodale Eastman and Indian Reform in the 1880s," by Ruth Anne Alexander, South Dakota History, Vol. 22, No. 1 (Spring 1992)

Ohiyesa: Charles Eastman, Santee Sioux by Raymond Wilson (1983)