U.S. Agencies: Geological Survey (General - Mineral Fuels Division)

U.S. Agencies: Geological Survey (General - Mineral Fuels Division), Box: 37/1.46. Records of the Kansas State Geological Survey, RG 37. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/540802 Accessed December 25, 2025.