Clues [v6 #4, first May 1928] ed. Carl Happel (15¢, pulp)
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Clues [v7 #3, second June 1928] ed. Carl Happel (15¢, pulp, cover by Joseph Doolin) Associate Editor: T. R. Associ.
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Clues [v8 #1, second July 1928] ed. Carl Happel (15¢, pulp) Associate Editor: T. R. Associ.
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Clues [v8 #2, first August 1928] ed. Carl Happel (15¢, pulp) Associate Editor: T. R. Associ.
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Clues [v8 #4, first September 1928] ed. Carl Happel (15¢, pulp) Associate Editor: T. R. Associ.
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