SWCGS, What Grain Elevator Operators should know about the enforcement program of the FDA in connections with insect infestation and rodent and bird contamination, May 1, 1952, Box: 25, Folder: 39. Frank A. Theis papers, RH MS 948. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/60985 Accessed July 10, 2025.