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Cover by John Giunta. Includes "Kingsridge 214" by August Derleth.
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Includes "Bomers Above" by Lieut. W. M. Wood.
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Includes "Destruction Of The Panama Canal" by Don Bate.
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Cover by Gilmore. Includes "Discord In Scarlet" by A. E. van Vogt.
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Two alternate covers are known to exist.
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Cover by F. Tinsley. Includes "Germany Flies Again" by Arch Whitehouse.
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Final issue. Includes "Emeralds Of The Inca" by George Creel.
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Cover by John Howett. Includes "Vault Of The Damned" by Nat Schachner.
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Cover by John Howitt. Includes "Legions Of The Death Master" by Curtis Steele.
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Cover by Schneeman. Includes "The Merman" by L. Sprague de Camp.
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Cover by Margaret Brundage. Includes "The Man Who Was Two Men" by A. W. Bernal.
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Cover by Ed Emsh. Includes "An Apple For The Teacher" by Robert F. Young.
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Cover by John Howitt. Includes "Hosts Of The Flaming Death" by Curtis Steele.
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Includes De Camp, Wellman.
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Includes "The Magician Of Mars" by Edmond Hamilton.
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Final issue. Cover by H.W. Wesso. Includes "The Cairn On The Headland" by Robert E. Howard.
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Cover by Rudolph Belarski. Includes "Devil's Planet" by Manly Wade Wellman.
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Includes "The Spider And The Raceless One" by Grant Stockbridge.
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Cover by Rogers. Includes "Methuselah's Children" part 1 by Robert Heinlein.
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Cover by John Newton Howett. Includes "Brides For The Dead" by Hugh B. Cave.
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Cover by John Howitt. Includes "Invasion Of The Dark Legions" by Curtis Steele.
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Cover by Earle K. Bergey.Includes "Blood On The Sun" by Hal K. Wells.
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Cover by Virgil Finlay. Includes "The Eyes Of The Mummy" by Robert Bloch.
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Cover by A. R. Tilburne. Includes "The Tombstone" by Ray Bradbury.
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Includes "The Humanoids" by Jack Williamson. Cover by Anderson.
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Cover by H. W. Brown. Includes "Mercutian Adventure" by Raymond Z. Gallun.
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Cover by Matt Fox. Includes "The Testament Of Clairborne Boyd" by August Derleth.
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Continuing from AIR ACTION.
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Includes "The Day Of The Damned" by Curtis Steele.
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Cover by John Howitt. Includes "Scourge Of The Invisible Death" by Curtis Steele.
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Cover by John Howitt. Includes "Master Of Broken Men" by Curtis Steele.
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Cover by John Howitt. Includes "The Invisible Empire" by Curtis Steele.
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Cover by John Howitt. Includes "Cavern Of The Damned" by Curtis Steele.
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Cover by Rogers. Includes "Nightfall" by Isaac Asimov.
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Cover by Alex Schomburg. Includes "Death Of Iron" by S. S. Held.
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Cover by Rogers. Includes "Recruiting Station" by A. E. van Vogt.
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Cover by Margaret Brundage. Includes "The Graveyard Rats" by Henry Kuttner.
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"Flying Coffins of the Damned" by Robert J. Hogan.
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Includes "The Time Machine" by H. G. Wells. Cover by Anderson.
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Includes "Purple Aces" by Robert J. Hogan.
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Cover by Graves Gladney. Features "Black Destroyer" by A. E. van Vogt and includes "Trends" by Isaac Asimov.
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Cover by Rogers. Includes "Universe" by Robert Heinlein.
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Cover by Margaret Brundage. Includes "The Metronome" by August W. Derleth.
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Cover by Hugh Rankin. Includes "Fungi From Yuggoth Part 3" by H.P. Lovecraft.
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Formerly Thrilling Mystery.
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Cover by John Hewitt. Includes "The Red Invader" by Curtis Steele.
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Includes "Frontier Planet" by Manly Wade Wellman.
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Cover by Margaret Brundage. Includes "Quest Of The Starstone" by C. L. Moore & Henry Kuttner.
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Includes "The Money Master" by Maxwell Grant.
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Includes "The Seven Sleepers" by Henry Kuttner & A.. Barnes.
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Includes "Dodging Clouds In Mexico" by Major Bernard A. Law.
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Includes "The Jumper" by Theodore Sturgeon.
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"Wings of the Gray Phantom" by Robert J. Hogan.
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"Hordes of the Wingless Death" by Robert J. Hogan.
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Cover by Earle K. Bergey. Includes "The Dark World" by Henry Kuttner.
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Formerly Detective Mystery.
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Cover by Alex Schomburg. Includes "The Hellflower" by George O. Smith.
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Includes "The Mathematics Of Magic" by L. Sprague de Camp & Fletcher Pratt.
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Cover by Matt Fox. Includes "The Cheaters" by Robert Bloch.
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Cover by John Newton Howett. Includes "Things That Once Were Men" by Wyatt Blassingame.
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Features "Waves of Death" by Kenneth Robeson.
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Cover by John Howitt. Includes "Patriot's Death Battalion" by Curtis Steele.
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Cover by Margaret Brundage. Includes "The Inverness Cape" by August Derleth.
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Includes "The Suicide Battalion" by Curtis Steele.
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Cover by John Howitt. Includes "America's Plague Battalions" by Curtis Steele.
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Cover by John Howitt. Includes "Invasion Of The Crimson Death Cult" by Curtis Steele.
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Includes "The Gold Ogre" by Kenneth Robeson
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Cover by J. Allen St. John. Includes "Bucaneers Of Venus (Part 1)" by Otis Adelbert Kline.
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Includes "Gunsmoke For Sale" by Laurence Donovan.
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Includes "We Bomb Tokyo!" by Jay Hamilton.
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Cover by Earle K. Bergey. Includes "Other Eyes Watching" by Polton Cross.
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Includes "The Quest Beyond The Stars" by Edmond Hamilton.
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Cover by Bill Wayne. Includes "The Shadow From The Steeple" by Robert Bloch.
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Includes "The Bloody Frontiers" by Curtis Steele.
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Cover by John Howitt. Includes "The Army Of The Dead" by Curtis Steele.
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Includes "Merchants of Disaster" by Kenneth Robeson
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Cover by Rogers. Includes "Forces Must Balance!" by Manly Wade Wellman.
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Includes "Asylum Satellite" by Fletcher Pratt.
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Cover by Margaret Brundage. Includes "The Shunned House" by H. P. Lovecraft.
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Includes "The Comet Kings" by Edmond Hamilton.
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Includes "Planets In Peril" by Edmond Hamilton.
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Features "The Book of Death" by Maxwell Grant.
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Cover by Earle Bergey. Includes "Lord Of The Storm" by Keith Hammond.
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Features "The Awful Dynasty" by Kenneth Robeson.
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