Letters credit from Todd Klein via his Klein Letters blog (19 September 2016, http://kleinletters.com/Blog/ira-schnapp-in-worlds-finest-comics-part-2/).
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Letters credit from Todd Klein via his Klein Letters blog (19 September 2016, http://kleinletters.com/Blog/ira-schnapp-in-worlds-finest-comics-part-2/).
Inside back cover.