Letters credit from http://kleinletters.com/. It seems that Buckler's signature was made by Giordano (same "R").
Inside front cover. Letters of comment from: T. M. Maple and Jeff Albrecht.
Inside front cover. Paid circulation: average 77,000; latest issue 78,000.
Story continues in the next issue.
Return of Sabbac. Spotlight on Captain Marvel, Jr.
Inside back cover. Part of the Daily Planet Feature Page.