Notes:
The on-sale date is the publication date reported in the U. S. Copyright Office filing found at the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 35, 1940, Number 2. Second class permit. Copyright number 455005. On-sale on April 25th per house ad in Detective Comics #39.
Indicia: Batman No. 1 * Spring 1940 Issue
Published quarterly by DETECTIVE COMICS, INC. 480 Lexington Avenue, New York, N. Y.