On sale date given in the previous issue. The on-sale date from Feature Comics #35 matches the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1940, New Series, Vol. 35, No. 3.
In the Quality Companion from TwoMorrows, Jim Amash states that Gill Fox began doing Doll Man covers with Feature Comics #54, so his dubious credit removed and replaced with ? by Craig Delich.
All Gustavson credits verified and courtesy of Terry Gustafson, son of Paul Gustavson.
Script credit suggested by the Who's Who.