Notes:
On sale date from the publication date found in the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 35, 1940, Number 2. Second class permit. Copyright No. B 452785. This was also reported as issue #5 to the Copyright Office. See https://publicrecords.copyright.gov/application-card/CC19381945B_452000-453999.0787 for more details. Copyright renewed 1967-06-01 as RE 411107 from Catalog of Copyright Entries, Third Series. Part 2: Periodicals Jan-Dec 1967: Vol 21, page 407.