Some colors in this issue were previously attributed to Marie Severin, but it is unlikely that Severin had begun coloring at EC when the EC’s Frontline Combat #2 was colored (Cassell 2012, 33–34 and 171). Severin is not known ever to have worked for Superior.
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Reference:
Cassell, Dewey, with Aaron Sultan. 2012. Marie Severin: The Mirthful Mistress of Comics. Raleigh: TwoMorrows Publishing.