Report of the Supplementary Subsoil Investigation made at the Proposed Site for the factory for the Royal Venezolana C.A., April 12, 1954, Box: 7, Folder: 7a. Personal papers of Donald E. Hatch, PP 272. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/451278 Accessed May 19, 2024.