This issue is a variant of Captain America (Marvel, 1968 series) #213 [30¢ Cover Price]. There exist further variants.
Verpoorten credit per Nick Caputo, August 2012. Nick previously listed Mike Royer as possible inker. Marvel Comics Index #8A lists Frank Giacoia as inker and Jim Novak as letterer.
Letters from Bill Dickenson, Allen Underwood, Bob Goodwin Jr., Jasper Sitwell