Ferstadt was, according to Jerry Bails' Who's Who, a studio run by Lou Ferstadt. This could be either his work or any of his assistants.
On inside front cover.
Harvey Kurtzman ? credit because a tombstone in the first panel has the initials "H.K." on it. Jerry Bails' Who's Who has Harvey Kurtzman as working on Lash Lightning in 1943.
On inside back cover.