Art credits per Bob Klein, Gene Reed, Bob Hughes, and Mike Tiefenbacher. Craig Delich and Pat Lang credit Jim Mooney. Letters credit from Todd Klein via his Klein Letters blog (18 September 2016, http://kleinletters.com/Blog/ira-schnapp-in-worlds-finest-comics-part-1/).
Writer credit from Bob Hughes. Showcase Presents Green Arrow says Ed Herron. 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/).