Avon Science Fiction Reader. New York: Avon Novels Inc., 1951

Avon Science Fiction Reader. New York: Avon Novels Inc., 1951, Volume: Gilbert B242. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525245 Accessed December 27, 2025.