Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (added by Gregory Fischer, June 2009).
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (May 2007).
house ad for Action Comics (DC, 1938 series) #373 [80 Page Giant #G-57], on sale January 7
letters submitted by Bob Ellis; A. E. Peters [Earnest Lee Pleading]; Joe Rusnak; Ron Keith
letters submitted by Samuel J. Dahir; Kevin Krell
Statement of October 1, 1968
Average number of copies sold during preceding 12 months (total paid circulation): 315,500
Actual number sold for issue nearest filing date (total paid circulation): 328,393
Owner: National Periodical Publications, Inc., 575 Lexington Avenue, N.Y.,N.Y., 10022, wholly owned by Kinney National Service, Inc., 10 Rockefeller Plaza, N.Y., N.Y. 10020, a publicly-held corporation