Charles Ohiyesa Eastman, M.D., Elaine Goodale Eastman, and the Colonization of the Last Frontier, 1860-1940 [working title], July 2008, Box: 4, Folder: 18-19. Gretchen Cassel Eick collection, RH MS 1574. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/532264 Accessed November 23, 2024.