Average # of copies sold previous year - 533,450.
Cover ink credits from Nick Caputo (September 28, 2006). Credits for pencils and inks from Julius Schwartz's editorial records provided by DC Comics, state that Irv Novick and Neal Adams were paid for the cover. However, art spotters for the GCD and www.nealadams.com, agree that Neal Adams alone did the pencils and inks for the cover (added by Gregory Fischer, May 2009).
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Letters of comment from Carole-Anne Lowe, Ron Jennings, Joe Rusnak and Steve Grabinsky.
Letters of comment from Mark Evanier, Bradely Anderson and Steve Carlberg.