Though Dick Sprang told Craig Delich he pencilled this cover, GCD art-spotters (Jim Van Dore, Craig Delich, Allen Ross, John Lang, Gene Reed, and Tony Rose) agree the Archives and Showcase Presents volumes correctly list Curt Swan for pencils. 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/).
Green Arrow has red hat.