Inside front cover.
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/).
Inker credit based on copies of DC's editorial records for this series sent to Gene Reed.
A. Talbott Roche is possibly a pseudonym for scripter John Talbot.
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/).