Go-Go Checks begin; First Direct Currents ad page.
On-sale date from ad in Sea Devils #28.
No Superman or Batman on cover (Bizarro versions).
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/).
Inside front cover.
writer credit verified by Bridwell
Between parts 1 and 2 of first story.
publisher: National Periodical Publications
575 Lexington Ave
New York, NY
Owners: Estate of Harry Donenfeld; Jack Liebowitz; P. Sampliner; Irwin Donenfeld; S. Sampliner; Sonia Iger.
No Sales figures. Statement of ownership was reprinted in World's Finest 158 with sales figures.
Editors' Round Table