This appendix lists all the editors and publishers of the sciencefiction magazines covered by this volume. The cut-off date is December 1950, though where magazines continue beyond that date the last issue of the individual's tenure is given.

Albing, Jerry

Publisher: Cosmic Stories, March–July 1941 (3 issues); Stirring Science Stories, February 1941–March 1942 (4 issues).

Assael, Harry

Publisher of Hamilton & Co., responsible for Futuristic Stories and Strange Adventures, 1946–47.

Assael, Samuel

Co-publisher and editor: Futuristic Science Stories, 1950–58 (16 issues); Worlds of Fantasy, 1950–54 (14 issues); Tales of Tomorrow, 1950–54 (11 issues).

Bacon, Daisy

Editor: The Shadow, Fall 1948–Summer 1949 (4 issues); Doc Savage, Winter–Summer 1949 (3 issues).

Baird, Edwin

Editor: Weird Tales, March 1923–April 1924 (12 issues).

Bates, Harry

Editor: Astounding Stories, January 1930–March 1933 (34 issues); Strange Tales, September 1931–January 1933 (7 issues).

Bay, G.R.

Editor: Mind Magic /My Self, June–December 1931 (6 issues).

Bixby, Jerome

Editor: Jungle Stories, Spring 1949–Spring 1954 (18 issues); Planet Stories, Summer 1950–July 1951 (7 issues); Two Complete Science- Adventure Books, Winter 1950–Summer 1951 (2 issues).

Blackwell, Frank

Editor-in-Chief: The Shadow, April 1931–March 1932 (8 issues).

Boardman, Tom V.

Probable editor of the British reprint Cosmic Science Stories, 1950 (1 issue).