Changing Conditions in the Grain World, address by Frank Theis before Annual Meeting of the Kansas Agricultural Convention, January 11, 1934, Box: 21, Folder: 17. Frank A. Theis papers, RH MS 948. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/60781 Accessed July 08, 2025.