Art credits from a Facebook comment by Alan Kupperberg and Mark Evanier on 2009 November 29.
Despite the large "All new stories" blurb on the cover, two of the stories inside are reprints.
Script and artist credits confirmed in The Comic Reader #84 (April 1972).
Alan Kupperberg did touch-ups and drew extensions for this reprint.
Alan Kupperberg did touch-up and extensions on the art.