24. Originals of Illustrations Returned by AAPG after Publication. Petroleum Prospects of Deep Offshore. Hedberg, Moody, Hedberg, Box: 83, Folder: 7. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/151403 Accessed June 01, 2024.