Credits from the reprint in Worlds Unknown (Marvel, 1973 series) #5.
Previous indexer credited Jack Abel inks.
Wessler credit from his record books, per Robin Snyder's the Comics,Vol 25, No. 8, August 2014.
Possible Wessler script per biblio info in Robin Snyder's The Comics Vol 28, No 5, May 2017. While the title is the same as Wessler's the dates do not match up, so this may be a case of a similar title used earlier.