Topographic map, lists of reptile specimens, University of Chicago Press bills, "Some Fish teeth from the Kansas Cretaceous" by S.W. Williston, Box: 1, Folder: 12. Personal papers of Samuel W. Williston, PP 32. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/391946 Accessed May 18, 2024.