Henbest, Nigel. The Exploding Universe. New York MacMillan. Typed letter, signed to Theodore Sturgeon from Jeanne Fredericks, MacMillan Publishing Co, April 20, 1979, Box: 6, Folder: 22a. Papers of Theodore Sturgeon, MS 254. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/243577 Accessed June 18, 2025.