Geologic Road Log, Salt Lake City to Rifle, Colorado via Vernal, Rangely, and Meeker. Prepared by J. Harlan Johnson and C.J. Monahan, May 18, 1939, Box: 7, Folder: 8. J. Harlan Johnson papers, RH MS 735. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/52831 Accessed May 25, 2024.