House ad for The Best of DC #6 [Superman] and DC Special Blue Ribbon Series #3 [Justice Society] (both July-August 1980); printed in World's Finest Comics #263 (June-July 1980)
Both comic covers: pencils by Ross Andru, inks by Dick Giordano
(DC Special Blue Ribbon Series #3 incorporates the covers of All-Star Comics #36 (art by Irwin Hasen) and #58 (art by Mike Grell))
Ad art by ???