On sale date from the publication date found at the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 35, 1940, Number 2. Second class permit. Copyright number 453577.
Jack Kirby removed from credits (Greg Theakston,
Joe Simon removed from credits(Jim Vadeboncoeur, Jr)
tentative art credit by Jim Vadeboncoeur, Jr 28-2-2009