Disputed penciler credit--Werner Roth alone per Steve Whitaker, Nick Caputo, Carl Gafford, and Michael Evans; Werner Roth with Jack Kirby per the original indexer.
Sources for letters credit are The Marvel Comics Index (Olshevsky 1981), The Official Marvel Index to the X-Men (Olshevsky 1987), and The Official Marvel Index to the X-Men (Ward 1994).
Mimic leaves X-Men, next app. in INCREDIBLE HULK #161.
Lettering credits provided by Rodrigo Baeza.