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The Overstreet Comic Book Price Guide #54 TMNT Cover - Gemstone Publishing,

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Action Comics Vol. 36 No. 428 (#428), October, 1973 DC Comics: Bates, Cary, Maggin, Elliot, Schwartz, Julius, Bridwell, E. Nelson, Nick Cardy / Curt Swan / Dick Giordano: Amazon.com: Books,

Lost Crossovers: The Epic Battle Between Captain Marvel and Spy Smasher, part one – The Tom Brevoort Experience