36th Regular Meeting, 11th Annual Meeting, Trans-Missouri-Kansas Shippers Board, American Railway Association, Car Service Division, June 21, 1933, Box: 28, Folder: 1. Frank A. Theis papers, RH MS 948. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/61081 Accessed July 16, 2025.