General correspondence - American Assoc[iation] of Petroleum Geologists [19]65-[19]66-[19]67-[19[68], Box: 1, Folder: 20-21. Personal papers of Raymond C. Moore, PP 3. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/167313 Accessed April 25, 2025.