1 loose leaf from RH MS E202 v.2: Business Accounts, International Bitumenoil Corp. (ledger), March 1926 - December 1939, Folder: 6. Business Records of William Hinckle Smith, RH MS P921. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/248453 Accessed January 13, 2025.