Daniels - Empire of the Gun (1962), Experiment in Fear (1963), The Fire Within (1962-[19]64), Forever Wyndward (1982), Box: 4, Folder: 37. 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/230101 Accessed May 19, 2024.