Caribbean Research Project "Accoustic Reflection Profiles: Venezuela Continental Borderland" from International Decade of Ocean Exploration, US Geological Survey, 1965, Box: 50, Folder: 3. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/150512 Accessed November 24, 2024.