Mene Grande Oil Company, C.A. Geological Department Summary Report of Field Excursion. Northeastern Venezuela by H.D. Hedberg, March 1947, Box: 51, Folder: 25. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/150566 Accessed June 15, 2024.