Letter from P. Schuyler Miller to Twayne Publishers, "The Reference Library," Astounding Science Fiction, November 16, 1952, Box: 17, Folder: 841. Papers of P. Schuyler Miller, MS 255. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/249863 Accessed May 18, 2024.