Bob Klein and Gene Reed originally listed Dick Sprang artist credits.
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/).
statement of ownership on the bottom of this page
Pencils and inks credits from Kurt Mitchell (2/20/05) and confirmed by Pat Lang. Previous pencils and inks credit of Bob Brown (Craig Delich, 1/06/05).