in The Official Marvel Index to the X-Men (Marvel, 1987 series) #2 (July 1987)
in Marvel Masterworks: The X-Men (Marvel, 2003 series) #5 ([August] 2005)
in The X-Men Omnibus (Marvel, 2009 series) #2 ([April] 2011)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). Marie Severin's credit per Feran Delgado's site, which features a stat of the original artwork
: http://ferrandelgado.blogspot.com/search?updated-max=2012-04-22T08:25:00...
in The X-Men (Marvel, 1963 series) #92 (February 1975)
in Marvel Special (Marvel Italia, 1994 series) #15 (Dicembre 1998)
in Marvel Masterworks: The X-Men (Marvel, 2003 series) #5 ([August] 2005)
in The X-Men Omnibus (Marvel, 2009 series) #2 ([April] 2011)Red Raven (last app. in RED RAVEN #1; last chron. app. in INVADERS #38; next app. in SUB-MARINER #26)
Sources for particularization of writing credits 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). Sources for particularization of pencils credits are The Official Marvel Index to the X-Men (1987) and The Official Marvel Index to the X-Men (1994).
in Amazing Adventures (Marvel, 1979 series) #7 (June 1980)
in The Marvel Saga (Marvel, 1985 series) #5 (April 1986)
in Marvel Special (Marvel Italia, 1994 series) #4 (Luglio 1995)
in Marvel Masterworks: The X-Men (Marvel, 2003 series) #5 ([August] 2005)
in The X-Men Omnibus (Marvel, 2009 series) #2 ([April] 2011)
in The X-Men Omnibus (Marvel, 2009 series) #2 ([April] 2011)