Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. Inks previously credited to Neal Adams.
This story has an early mention of Darkseid.
Letters of comment from Allan Ferguson, Greg Kent, and Stephen Randisi. Located between story pages 13 and 14.
House ad for DC Special (DC, 1968 Series) #11 (March-April 1971), with cover shown. Located between story pages 19 and 20.