Worlds Beyond: The Everlasting Frontier, edited by Larry Geis and Fabrice Florin with Peter Beren and Aidan Kelly, 1978, Box: 39, Folder: 19. Papers of Theodore Sturgeon, MS 254. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/244467 Accessed May 29, 2024.