Sources for letters credit are 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). Simek credit per Nick Caputo, June 2012.
A caption appears above the cover reprint: "The Adaptoid strikes in Iron Man this month, too! But here's the original cover for his clash with the X-Men!"