Western Europe, energy - "Natural gas in Western Europe, 1969" by P. R. Odell and "New horizon for gas in Europe, 1964" by E. Symonds, Box: 14, Folder: 48. Charles Heller papers, RH MS 314. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/490238 Accessed May 02, 2024.