Julius Schwartz's editorial records credited Kane and Adams, although they drew two separate covers. Kane drew a rejected cover that was revised by Neal Adams, as seen here:
Schwartz records provided by DC Comics. [July 2007]. Adams credit and Kane original artwork info per Nick Caputo.
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (May 2007).
house ad for Superman (DC, 1939 series) #227 [80 Page Giant #G-72], on sale April 14
letters submitted by Martin Pasko; Don McGregor; Alan Brennert; Steven Carlberg; Joe Arul