The following lists all of the editors and publishers of the science-fiction magazines covered by this volume. The cut-off date is December 1970, though where magazines continue beyond that date the last issue of the individual's tenure is given.

Ackerman, Forrest J.

Associate Editor: A Book of Weird Tales, #1, 1960.

Managing Editor: Perry Rhodan, April 1969–January 1978 (118 issues).

Adris, Ralph see Lehrman, Herb

Anders, Bart

Editor: Shock Mystery Tales, December 1961–February 1963 (7 issues).

Arthur, Robert

Managing Editor: The Mysterious Traveler Magazine, November 1951–August 1952 (5 issues).

Assael, Samuel

Co-publisher and Editor: Futuristic Science Stories, 1950–1958 (16 issues); Worlds of Fantasy, 1950–1954 (14 issues); Tales of Tomorrow, 1950–1954 (11 issues); Wonders of the Spaceways, 1951–1954 (10 issues); Supernatural Stories, 1954–1967 (109 issues); Out of This World, 1954–1955 (2 issues).

Avallone, Michael

Editor: Space SF Magazine, Spring–August 1957 (2 issues); Tales of the Frightened, Spring–August 1957 (2 issues).

Baker, W. Howard

Assistant Editor: Authentic SF, February–October 1954 (9 issues).

Bell, George see Palmer, Raymond A.

Benjamin, Judy-Lynn (as Judy-Lynn del Rey from 21 March 1971)

Associate Editor: Galaxy, June 1966–May 1969 (24 issues); If, June 1966–May 1969 (36 issues); International SF, November 1967–June 1968 (2 issues); Worlds of Fantasy, September 1968 (1 issue).

Managing Editor: Galaxy, July 1969–July 1973 (33 issues); If, July 1969–June 1973 (28 issues); Worlds of Tomorrow, Summer 1970–Spring 1971 (3 issues); Worlds of Fantasy, Fall 1970–Spring 1971 (3 issues).