Some Matters of Concern to the Petroleum Industry with Respect to Public Policy on Mineral Resources of the World Ocean. Rhode Island, July 1968, Box: 94, Folder: 21. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/151769 Accessed November 24, 2024.