J.H. Mayhew - information on mining projects in the West, including Arizona, California, Colorado, and Mexico, 1950s-1960s, Box: 8, Folder: 1-6. Mayhew family papers, RH MS 634. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/82002 Accessed May 17, 2024.