"Oil shale technology: a review" by J. M. Thorne, K. E. Stanfield, G. U. Dinneen, and W. I. R. Murphy, 1964, Box: 20, Folder: 26. Charles Heller papers, RH MS 314. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/492934 Accessed December 01, 2024.