Energy policy - lecture 10, "The economics of oil transport, refining, and marketing operations" by M. E. Hubbard, 1965, Box: 21, Folder: 17. Charles Heller papers, RH MS 314. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/493101 Accessed November 28, 2024.