Robert P. Mills with Robert Murray (Contributor), Will Worthington (Contributor), Ward Moore (Contributor), Grendel Briarton (Contributor), Richard McKenna (Contributor), Robert J. Tilley (Contributor), Howard Fast (Contributor), Jane Rice (Contributor), Algis Budrys (Contributor), Evelyn E. Smith (Contributor)

Robert P. Mills with Miriam Allen Deford (Contributor), Reginald Bretnor (Contributor), Avram Davidson (Contributor), Clifford D. Simak (Contributor), Poul Anderson (Contributor), Robert Sheckley (Contributor), Ray Bradbury (Contributor), Theodore Sturgeon (Contributor), John Collier (Contributor)

Robert P. Mills with George P. Elliott (Contributor), Gordon R. Dickson (Contributor), Joseph Whitehill (Contributor), Daniel Keyes (Contributor), Edgar Pangborn (Contributor), Reginald Bretnor (Contributor), Manly Wade Wellman (Contributor), Kurt Kusenberg (Contributor), Rosel George Brown (Contributor), G. C. Edmondson (Contributor)

Robert P. Mills with Fred McMorrow (Contributor), Philip José Farmer (Contributor), Gordon R. Dickson (Contributor), Rex Lardner (Contributor), John Collier (Contributor), Fritz Leiber (Contributor), Reginald Bretnor (Contributor), Arthur Porgess (Contributor)

Robert P. Millon with Clifford D. Simak (Contributor), Avram Davidson (Contributor), H. F. Ellis (Contributor), Howard Fast (Contributor), Will Worthington (Contributor), Grendel Briarton (Contributor), John Berry (Contributor), Charles Henneberg (Contributor), Mrs. Agate (Contributor)

Robert P. Mills with Wilson Tucker (Contributor), A. H. Z. Carr (Contributor), Hollis Alpert (Contributor), Avram Davidson (Contributor), Gordon R. Dickson (Contributor), Reginald Bretnor (Contributor), Stephen Barr (Contributor), Zenna Henderson (Contributor), Theodore R. Cogswell (Contributor), Miriam Allen DeFord (Contributor)

Robert P. Mills with Reginald Bretnor (Contributor), Jack Sharkey (Contributor), John F. Suter (Contributor), Raymond E. Banks (Contributor), Stephen Barr (Contributor), G. C. Edmondson (Contributor), Robert Arthur (Contributor), Robert F. Young (Contributor), Avram Davidson (Contributor), Rosel George Brown (Contributor)

Robert P. Mills with Kit Reed (Contributor), Evelyn E. Smith (Contributor), Reginald Bretnor (Contributor), Gordon R. Dickson (Contributor), Poul Anderson (Contributor), George P. Elliott (Contributor), Joseph Whitehill (Contributor), Burton Raffel (Contributor), Reginald Bretnor (Contributor)

Robert P. Mills with James Blish (Contributor), Richard Matheson (Contributor), Poul Anderson (Contributor), Wade Miller (Contributor), Philip José Farmer (Contributor), Arthur C. Clarke (Contributor), Katherine MacLean (Contributor), Allen Drury (Contributor), Reginald Bretnor (Contributor), Howard Fast (Contributor)

Robert P. Mills with John W. Vandercook (Contributor), Keith Laumer (Contributor), Bruce Jay Friedman (Contributor), Robert F. Young (Contributor), Vance Aandahl (Contributor), Robert Choly (Contributor), Will Worthington (Contributor), Reginald Bretnor (Contributor), Mack Reynolds (Contributor)