E.W. Johnson - Polarities (1969), Cyril Judd - Gunner Cade (1982), Outpost Mars (1983), Box: 10, Folder: 38. Corporate Papers of the Robert Mills Literary Agency, MS 307. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/229740 Accessed November 23, 2024.