There are no fillers in this issue.
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/).
Bob Klein and Gene Reed contends that Paris did the inks.
Martin O'Hearn contends that Jerry Coleman did the script. Bob Hughes contends that the script is by Bill Finger.