On sale date from the publication date as submitted to the U.S. Copyright Office found in the Catalog of Copyright Entries, Part 2, Periodicals, 1941, New Series, Volume 36, Number 2. Class B periodical. Copyright registration number B 493109. Volume number also reported to Copyright Office but not in the actual comic book itself.
The Who's Who verifies, as do Mike Kooiman and Jim Amash in the Quality Companion, that Kiefer, not only created this feature, but did the art for it through the strip's entire run. However, the Who's Who does not specify a writer for the strip (although Kiefer is usually considered to have written it) so a ? has been placed after his name as writer.
Drew Allen is a house by-line and not the name for any real person.
Lena Pry is the Sunday footer (topper) comic strip to the Jane Arden comic strip.
All Gustavson credits verified and courtesy of Terry Gustafson, son of Paul Gustavson.
Larry Spain is a house by-line and not the name of a real person.