"The Future of the Petroleum Industry in the Oceans", Industry's Future in the Ocean: The Challenge and the Reality, Miami, Florida, March 3-5, 1968, Box: 94, Folder: 10. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/151758 Accessed November 24, 2024.