Cover letters credit confirmed by Todd Klein in The Danny Crespi Files Part 12, posted 23 June 2017 on his blog (Todd Klein's Blog at Goodreads). The Marvel Comics Index (Olshevsky 1981) credited Annette Kawecki.
Letters of comment from readers Ken Hart, Meredith Robbins, Kirk Tingblad, Smokey Joe, and Mike Nelson; includes a house ad for X-Men.