Cover credits per Dr. Michael J. Vassallo as noted in Marvel Masterworks Atlas Era Strange Tales Volume 4.
Coloring credit per Stan Goldberg.
The last page appears to be altered/redrawn by another artist, possible Sol Brodsky and/or Carl Burgos. The lettering is also be someone other than Ayers. Nick Caputo suspects the page was revised at the request of the newly formed Comics Code Authority.