On sale date from the publication date and volume number found in the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 34, 1939, Number 2. Second class permit. Copyright number 405352. Volume number not recorded in the actual comic itself.
Published monthly in St. Louis, Missouri
by Detective Comics Inc. 480 Lexington Ave, NY NY
Editor Vin Sullivan, Business Manager J. S. Liebowitz
Owner: Harry Donenfeld 110 Riverside Drive New York, NY.
Inside back cover.