Aldiss, Brian W. with David Wingrove. Trillion Year Spree: The History of Science Fiction, New York: Atheneum, 1986, 511 p.
Traces the history of science fiction literature.
Ashley, Michael. “Introduction: SF Bandwagon.” In The History of the Science Fiction Magazine, Volume 2: 1936-1945, edited by Michael Ashley, pp. 11-76. Chicago: Henry Regnery Company, 1975.
Chronicles the proliferation of pulp magazines and science fiction stories.
Baxter, Stephen. “Moon Believers: Robert A. Heinlein and America's Moon.” Foundation, no. 74 (autumn 1998): 26-37.
(The entire section is 774 words.)