1. On borderlands;Hämäläinen;Journal of American History,2011
2. Bickenheuser, C. 1898a. Local and Personal, 28 September 1898, p. 3.
3. Newton, C. 2018. Equestrian hunter-gatherers and the animal trade of the western Great Plains and adjacent Rocky Mountains, 1800–1860 . Unpublished PhD dissertation, University of Colorado.
4. The Sound of Silence
5. Big Horn River Pilot. 1897. Chief Washakie, 4 August 1897, p. 1.