Matila Simon - Travel Without Tears (1967), The Rape of the Louvre (1968), Clifford Simak - Time is the Simplest Thing (1963, 1964, 1965), Box: 20, Folder: 39. 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/229861 Accessed May 15, 2024.