Roth pencils with the Kulkulkan figure drawn by Jack Kirby per Steve Whitaker, Nick Caputo, Carl Gafford, and Michael Evans. Original indexer only credited Roth.
Possible Kuramoto letters per Nick Caputo. Rosen erroneously credited in 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). Possible Kuramato credit per Nick Caputo, June 2012.
Letters from Bruce Wilkins, John Brown, Mariane Soroka, Ted Perry, Ed Dudak, Fred Gillam, Gerry Lammers, and Steve Zeigler & Jan Bertholf.