Cover colors credit from Greg Theakston via the GCD Error List (5 April 2008)
Jack Kirby redrew the creature on pages 4-6, with the exception of page 5, panel 3. Info per Nick Caputo's Blog:
Inks previously credited to "Steve Ditko; Jack Kirby", but this looks more like George Roussos throughout.
Possible McCarty inks per Nick Caputo. Previous indexer credited John Forte.