Notes:
On sale date from the publication date and the volume number found at the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 35, 1940, Number 2. Class B periodical. Copyright number B 455644. Volume and issue number not in the indicia.
May 1, 1940 on sale date confirmed from an online copy at the Digital Comic Museum (http://digitalcomicmuseum.com/index.php?dlid=17986, retrieved June 27, 2015), on page 2 marked with on sale date of May 1, 1940.