This issue is a variant of Action Comics (DC, 1938 series) #526 [Direct Sales].
On-sale date from Comic Reader #194.
Color credits provided by Anthony Tollin.
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
letters submitted by Bill Curley, David Coakley, Alan Gary Giroux, Tim Wahowske, Matt Kilkelly