Disputed inker credit--Tom Palmer per Steve Whitaker, Nick Caputo, Carl Gafford, and Bob Ford (uncertain); Neal Adams per the original indexer. Also crediting Adams with inks are The Marvel Comics Index (Olshevsky 1981), The Official Marvel Index to the X-Men (Olshevsky 1987), The Official Marvel Index to the X-Men (Ward 1994), and Official Index to the Marvel Universe (Vandal et al. 2009).
Sources for letters credit are The Marvel Comics Index, The Official Marvel Index to the X-Men (1987), The Official Marvel Index to the X-Men (1994), and Official Index to the Marvel Universe.
Sources for particularization of script credits are The Marvel Comics Index (Olshevsky 1981), The Official Marvel Index to the X-Men (Olshevsky 1987), The Official Marvel Index to the X-Men (Ward 1994), and Official Index to the Marvel Universe (Vandal et al. 2009).