Simak - The Unsilent Spring (1974), Edgar Snow - The Other Side of the River (1969), Red China Today (1971), Box: 20, Folder: 16. 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/230634 Accessed November 23, 2024.