Benton Fauna of Colorado and Kansas and its recorded geologic range, Jour. Pal. 4 #2, 1930, Box: 3, Folder: 15. J. Harlan Johnson papers, RH MS 735. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/52771 Accessed December 13, 2024.