The on-sale date is the publication date reported in U. S. Copyright Office filings.
Distributed to newstands in January 1963. This issue includes 10 pages of paid advertisements.
Distribution date from Joseph Marek's Marvel Comics Group history website.
Inks credit changed from Dick Ayers by Nick Caputo via the GCD Errors list, February 2009. Letters credit from George Olshevsky's Marvel Comics Index.
The Voice next appears in West Coast Avengers (Marvel, 1985 series) #36 (September 1988). In this story Ant-Man is said to live in "Center City".
The first page is printed between the pages of the Ant-Man story, while the second page is printed between "The Eyes of the Mummy!" and "I Am Not Human!". The last page is split with the statement of ownership.
Average circulation per issue October 1961–September 1962 (issues #28–38, despite monthly cover dates): 139,167. This shares the last page of "Secret Mission".