Annotated bibliography supplement, Vitamin B1 (Thiamine Hydrochloride) Merck and Company, Inc, 1941, Box: 1, Folder: 67. Personal Papers of Elmer V. McCollum, PP 120. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/292854 Accessed December 13, 2024.