Venus Plus X [introduction to the Gregg Press edition by Paul Williams, footnotes, fan letter, article "Venus Plus X: Sturgeon's Rite of Passage" by Henry J. Lindborg in Extrapolation, Volume 24, Number 3, loose pages on Sturgeon from Critical Survey of Long Fiction], 1968 - 1983, Box: 18, Folder: 13-14. Papers of Theodore Sturgeon, MS 303. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/192556 Accessed November 23, 2024.