this looks more late 70's/early 80's era Kirby art, although I guess it must. have been done at DC's specification during the 1970-1972 period, or Anderson would not have inked the Superman head.
It looks like a foldout poster, wonder where it's from. Maybe a toy giveaway?
It was from a Superman card/puzzle game that came out in the early to mid-seventies. My younger brother had it as a kid. More pictures from the card game, including what looks like Superman fighting Marvel's Devil Dinosaur and the Toad Men are available here
