Notes:
On sale date from the publication date found at the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 35, January-December 1940, Numbers 1-4. Class B periodical. Copyright number B 440639. See https://publicrecords.copyright.gov/application-card/CC19381945B_440000-441999.0640 for more detail. Renewed 1967-05-17 as No. RE 410147 from Catalog of Copyright Entries, Third Series. Part 2: Periodicals Jan-Dec 1967: Vol 21, page 406.