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Includes "The Sky Ring" by Maxwell Grant.
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Cover by Earle K. Bergey. Includes "A Million Years To Conquer" by Henry Kuttner.
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Includes "Flame Of Allah" by Achmed Abdullah.
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25th anniversary issue. Cover by Jack Coggins. Includes "Time Pawn" by Philip K. Dick.
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Includes "Nazi Terror Over New York" by Robinson MacLean.
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Cover by William Timmins. Includes "Clash By Night" by Lawrence O'Donnell.
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Includes "The Time Machine" by H. G. Wells. Cover by Anderson.
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Includes "Traitress' Wages" by Lew Merrill.
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"Cargo Unknown" by Kenneth Robeson.
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Includes "Swooning Lady" by Kenneth Robeson.
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Cover by Bill Wayne. Includes "The Shadow From The Steeple" by Robert Bloch.
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Cover by Rogers. Includes "Salvage" by Vic Phillips
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Cover by John Howitt. Includes "Drums Of Destruction" by Curtis Steele.
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Includes "The Sign Of Zorro" by Johnston McCulley.
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Includes "Captain Future And The Seven Space Stones" by Edmond Hamilton.
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Cover by Earle K. Bergey. Includes "Sojarr Of Titan" by Manly Wade Wellman.
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Includes "The Telepathic Tomb" by Frederic Arnold Kummer, Jr.
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"Sky Coffins for Satan" by Robert J. Hogan.
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Cover by H. W. Scott. Includes "Slaves Of Sleep" by L. Ron Hubbard.
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Formerly Detective Mystery.
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Cover by Rudolph Belarski. Includes "O'Leary's Byno-Blaster" by Arthur Guy Empy.
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Cover by William Timmins. Includes "Doodad" by Ray Bradbury.
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Cover by Matt Fox. Includes "Floral Tribute" by Robert Bloch.
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Features "Blood Donor Boomerang" by Frederick C. Davis.
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Cover by Modest Stein. Features "Overthrow" by Cleve Cartmill.
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Includes "The Men Vanished" by Kenneth Robeson.
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Cover by H. W. Brown. Includes "Crystallized Thought" by Nat Schachner.
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Two alternate covers are known to exist.
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Cover painting by Howard V. Brown. Includes "The Shadow Out Of Time" by H.P. Lovecraft.
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Includes "Five Aces West" by Cliff Farrell.
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Cover by Bill Wayne. Includes "A Black Solitude" by Russell Wakefield.
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Cover by Ed Emsh. Includes "Too Late For Eternity" by Bryce Walton.
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Includes "Brat" by Theodore Sturgeon.
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Includes "No Greater Love" by Henry Kuttner.
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Cover by Walter Popp. Includes "Big Planet" by Jack Vance.
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Cover by Belarski. Includes "All Survivors Report" by Georges Surdez.
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Includes "The Spider At Bay" by Grant Stockbridge.
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Cover by William Timmins. Includes "Hunch" by Clifford D. Simak.
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Cover by J. Allen St. John. Includes "Buccaneers Of Venus (Part 3)" by Otis Adelbert Kline.
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Cover by Matt Fox. Includes "The Dweller In Darkness" by August Derleth.
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Includes "Mad Mesa" by Kenneth Robeson.
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Formerly Thrilling Mystery.
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Cover by Earle Bergey. Includes "Earthmen No More" by Edmond Hamilton.
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"The Pirate's Ghost" by Kenneth Robeson.
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Cover by John Howett. Includes "Vault Of The Damned" by Nat Schachner.
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Includes "The Yellow Cloud" by Kenneth Robeson.
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"Red Wings for the Death Patrol" by Robert J. Hogan.
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Cover by John Giunta. Includes "The Trail Of Cthulhu" by August Derleth.
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Includes "Your Money's Worth In The Air" by Lieut. W. M. Wood.
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Includes "The Quest Of Tarzan" by Edgar Rice Burroughs.
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"The King of Terror" by Kenneth Robeson.
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Cover by C.C. Serf. Includes "The Whisper In The Darkness" by H.P. Lovecraft.
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Includes "The Great Airways" by Capt. Samuel Taylor Moore.
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Includes "Make Mine Light" by Arch Whitehouse.
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Includes "Frontier Planet" by Manly Wade Wellman.
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Cover by Ed Valigursky. Includes "The Snows Of Ganymede" by Poul Anderson.
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Cover by Lee Brown Coye. Includes "Rapport" by Mary Elizabeth Counselman.
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Includes "The Gray Creatures" by Zorro.
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Cover by Joseph Eberle. Includes "A Corner For Lucia" by August Derleth.
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"Death Rides the Lost Patrol" by Robert J. Hogan.
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Includes "The Crossroads" by L. Ron Hubbard.
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"Wings of the Hawks of Death" by Robert J. Hogan.
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Features "Murder Mansion" by Maxwell Grant.
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Features "Waves of Death" by Kenneth Robeson.
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Includes "The Dual World" by Arthur K. Barnes.
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Includes "Tomb for the Living" by Justin Case.
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Includes "The Pure Evil" by Kenneth Robeson.
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Includes "Town Marshall" by Walt Coburn.
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Cover by F. Tinsley. Includes "The Black Hawk" by George L. Eaton.
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Includes "The Devil Makes The Law!" by Robert Heinlein.
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Cover by William Timmins. Includes "Ghost" by Henry Kuttner.
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Cover by Earle K. Bergey. Includes "What Mad Universe" by Fredric Brown (first published appearance of this novel).
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Cover by Alex Schomburg. Includes "The White Widows" by Sam Merwin, Jr.
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Cover by A. R. Tilburne. Includes "Satan's Phonograph" by Robert Bloch.
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Cover by John Howitt. Includes "The Mill-Town Massacres" by Grant Stockbridge.
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Cover by John Howitt. Includes "Slaves Of The Murder Syndicate" by Grant Stockbridge.
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Includes a 16-page color comics section.
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Cover by Margaret Brundage. Includes "Lansing's Luxury" by August Derleth.
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Cover by Rudolph Belarski. Includes "The Purple Warriors Of Neptunia" by Arthur Guy Empy.
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Includes "The Onslaught From Rigel" by Fletcher Pratt.
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