Simak - Correspondence (1974-1979) - The Worlds of Way Station (1959, 1962, 1963, 1964, 1980), Box: 20, Folder: 11. 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/230629 Accessed November 23, 2024.