If, Worlds of Science Fiction Year 1965 Magazine Back Issues
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- Retief, God-Speaker By Keith Laumer
- The Recon Man By Wilson Tucker
- Beginning This Issue - Starchild
- A Great New Science-Fiction Novel By Frederik Pohl And Jack Williamson
- Worlds Of Science Fiction
- The Replicators By A.E. Van Vogt
- February 1965 / 50c
- Meeting On Kangshan By Eric Frank Russell
- Stone Place By Fred Saberhagen
- Concluding- Starchild By Jack Williamson And Frederik Pohl
- The Altar At Asconel
- By John Brunner And Other Stories
- April 1965 / 50c
- Raindrop Hal Clement
- Way Station Irving E. Con, Jr.
- Concluding-The Altar At Asconel By John Brunner
- Beginning This Issue - Skylark DuQuesne
- A Great New Science - Fiction Novel
- By E. E. Smith Ph. D.
- Author Of The Skylark of Valeron, Galactic Patrol, Gray Lensman, Etc.
- The Last Earthman By Lester Del Rey
- Continuing- Skylark Duquesne By Edward E. Smith, Ph, D.
- Two Of Science Fiction's Greatest Writers Join To Bring You An Exciting New Story!
- Research Alpha By A. E. Van Vogt And James H. Schmitz
- Continuing The Most Famous Science-Fiction Saga Of All Time
- Skylark DuQuesne By Edward E. Smith, Ph. D.
- Retief Defies The Mightiest Warriors Of The Galaxy!
- Trick Or Treaty By Keith Laumer
- New 32 Extra Pages
- More Stories No Increase In Price!
- Stories By Fritz Leiber-Frederik Pohl - Keith Laumer
- C. C. MacApp, Edward E. Smith And Many Others!
- Earth's Most Unpredictable Diplomat
- Takes On A Planet Of Living Machines!
- Retief's War By Keith Laumer
- Thrilling Science-Fiction Novel
- The Doomsday Men By Kenneth Bulmer
- A Complete Science-Fiction Novel
- They Real Dread Men's Minds To Trap A Living Enemy!
- Masque Of The Shift By Fred Saberhagen - Tiger Green By Gordon R. Dickson
- Robert A. Heinlein's
- Greatest Novel Since Stranger In A Strange Land
- The Moon Is A Harsh Mistress
- And Many Other Stories
19521953195419551956195719581959196019611962196319641965196619671968196919701971197219731974
If was an American science fiction magazine launched in March 1952 by Quinn Publications, owned by James L. Quinn.
The magazine was moderately successful, though for most of its run it was not considered to be in the first tier of American science fiction magazines. It achieved its greatest success under editor Frederik Pohl, winning the Hugo Award for best professional magazine three years running from 1966 to 1968. If published many award-winning stories over its 22 years, including Robert A. Heinlein's novel The Moon Is a Harsh Mistress and Harlan Ellison's short story "I Have No Mouth and I Must Scream". The most prominent writer to make his first sale to If was Larry Niven, whose story "The Coldest Place" appeared in the December 1964 issue.
If was merged into Galaxy Science Fiction after the December 1974 issue, its 175th issue overall.
