Knockout Magazine (1937-1938 Popular Publications) Pulp comic books 1955 or before
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Published Jan 1937 by Popular Publications.
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Published Mar 1937 by Popular Publications.
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Published May 1937 by Popular Publications.
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Published Jul 1937 by Popular Publications.
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Published Sep 1937 by Popular Publications.
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Published Nov 1937 by Popular Publications.
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Published Feb 1938 by Popular Publications.
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Published Apr 1938 by Popular Publications.
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Published Jun 1938 by Popular Publications.