Letter from P. Schuyler Miller to R.S. Richardson, c/o Astounding Science Fiction, November 1, 1948, Box: 13, Folder: 427. Papers of P. Schuyler Miller, MS 255. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/249452 Accessed May 14, 2024.