Hoover, J.E. (3 folders) and Humphery; HCUA (8 folders), Box: 91. Edward M. Greb personal library on government, politics, economics, and history, RH WL MS 29. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/51797 Accessed April 27, 2025.