On-sale date from ad in 80 Page Giant Magazine #8 and copyright registration.
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/).
On the page between page 2 and page 3 of the previous story sequence.
Publisher: National Periodical Publications
575 Lexington Ave, NY, NY 10022
Editor: Mort Weisinger
Owners: Harry Donenfeld, Jack Liebowitz; P Sampliner; Irwin Donenfeld, S Sampliner, Sonia Iger.
No circulation figures