History - "World oil, economic, social, and political" by A. G. Mezerik from Internationl Review Service, vol. V, no. 52, Box: 20, Folder: 35. Charles Heller papers, RH MS 314. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/492944 Accessed May 16, 2024.