Dunn, Dorothy (Intro), 1877: Plains Indian Sketch Books of Zo-Tom and Howling Wolf, Flagstaff, Arizona: Northland Press, 1969

Dunn, Dorothy (Intro), 1877: Plains Indian Sketch Books of Zo-Tom and Howling Wolf, Flagstaff, Arizona: Northland Press, 1969, Box: 7. John Anderson papers, MSS 0312. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/87358 Accessed September 16, 2024.