in The X-Men (Marvel, 1963 series) #75 (April 1972)
in Marvel Special (Marvel Italia, 1994 series) #5 (Dicembre 1995)
in Custom: Deal - Fox Home Entertainment (X-3 Stan Lee Comic) (Marvel, 2006 series) #1 (September 2006)
in The X-Men Omnibus (Marvel, 2009 series) #1 ([April] 2009)
in X-Men Annual (Marvel, 1970 series) #1 (December 1970)
in Marvel Masterworks: The X-Men (Marvel, 2003 series) #7 [Regular Edition] ([October] 2008)
in The Official Marvel Index to the X-Men (Marvel, 1987 series) #1 (May 1987)
in Marvel Masterworks (Marvel, 1987 series) #3 ([November] 1987)
in Marvel Milestone Edition: X-Men Vol.1, No. 9 (Marvel, 1993 series) #[nn] (October 1993) [Cover]
in X-Men: The Early Years (Marvel, 1994 series) #9 (January 1995)
in Marvel Masterworks: The X-Men (Marvel, 1998 series) #[1] (December 1998)
in Essential Uncanny X-Men (Marvel, 1999 series) #1 (September 1999)
in Marvel Masterworks: The X-Men (Marvel, 2002 series) #1 (April 2002)
in Giant-Size X-Men (Marvel, 2005 series) #3 (2005)
in Marvel Visionaries: Jack Kirby (Marvel, 2004 series) #2 ([March] 2006)
in Custom: Deal - Fox Home Entertainment (X-3 Stan Lee Comic) (Marvel, 2006 series) #1 (September 2006)
in The X-Men Omnibus (Marvel, 2009 series) #1 ([April] 2009)Sources for letters credit 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).
in X-Men Annual (Marvel, 1970 series) #1 (December 1970)
in Amazing Adventures (Marvel, 1979 series) #3 (February 1980)
in Mighty Marvel Team-Up Thrillers (Marvel, 1983 series) #[nn] (1983)
in Marvel Masterworks (Marvel, 1987 series) #3 ([November] 1987)
in Marvel Milestone Edition: X-Men Vol.1, No. 9 (Marvel, 1993 series) #[nn] (October 1993)
in X-Men: The Early Years (Marvel, 1994 series) #9 (January 1995)
in Marvel Special (Marvel Italia, 1994 series) #5 (Dicembre 1995)
in Marvel Masterworks: The X-Men (Marvel, 1998 series) #[1] (December 1998)
in Essential Uncanny X-Men (Marvel, 1999 series) #1 (September 1999)
in Marvel Masterworks: The X-Men (Marvel, 2002 series) #1 (April 2002)
in Giant-Size X-Men (Marvel, 2005 series) #3 (2005)
in Marvel Visionaries: Jack Kirby (Marvel, 2004 series) #2 ([March] 2006)
in Custom: Deal - Fox Home Entertainment (X-3 Stan Lee Comic) (Marvel, 2006 series) #1 (September 2006)
in The X-Men Omnibus (Marvel, 2009 series) #1 ([April] 2009)
in X-Men vs. Avengers (Marvel, 2010 series) #[nn] [premiere edition] (2010)
in X-Men vs. Avengers / Fantastic Four (Marvel, 2011 series) #[nn] (2011)
in Avengers vs X-Men Hors-Série (Panini France, 2012 series) #1 (octobre 2012)
in Marvel Super-Heroes (Marvel, 1967 series) #21 (July 1969)
in Amazing Adventures (Marvel, 1979 series) #3 (February 1980)
in Giant-Size X-Men (Marvel, 2005 series) #3 (2005)
in Custom: Deal - Fox Home Entertainment (X-3 Stan Lee Comic) (Marvel, 2006 series) #1 (September 2006)
in The X-Men Omnibus (Marvel, 2009 series) #1 ([April] 2009)