Earth appears in 7 issues in this volume.
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Issue #7
ULTIVAC is Loose!
April 1957
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Issue #11
The Day the Earth Blew Up!
December 1957
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Issue #20
Prisoners of 100 Million B.C.
June 1959
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Issue #47
Doomsday for Planet Earth
December 1963
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Issue #60
War That Shook the Universe!
February 1966
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Issue #61
Beyond the Sinister Barrier
April 1966
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Issue #74
It Could be You
May 1968
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