Geology map of Pottawatomie Reservation from the US Department of Interior, Geological Survey of the Kansas Topeka Quadrangle [2 copies], 1949, Folder: 1 (oversize), item: 4-5. Personal papers of James A. Clifton, PP 528. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/164514 Accessed May 17, 2024.