in Los Hombres X (Editora de Periódicos La Prensa S.C.L., 1966 series) #3 (31 de marzo de 1966)
in Marvel's Greatest Superhero Battles (Simon and Schuster, 1978 series) #[nn] (1978)
in Amazing Adventures (Marvel, 1979 series) #5 (April 1980)
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 Uncanny X-Men Masterworks (Marvel, 1993 series) #1 (February 1993)
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 The X-Men Omnibus (Marvel, 2009 series) #1 ([April] 2009)Disputed inker credit--Sol Brodsky from The Marvel Comics Index (Olshevsky 1981) and The Official Marvel Index to the X-Men (Olshevsky 1987), with Nick Caputo, Bob Ford, this site’s original indexer, and Official Index to the Marvel Universe (Vandal et al. 2009) concurring; Paul Reinman per Steve Whitaker; Frank Giacoia per Carl Gafford.
Sources for letters credit are The Marvel Comics Index, The Official Marvel Index to the X-Men, and Official Index to the Marvel Universe.
in Los Hombres X (Editora de Periódicos La Prensa S.C.L., 1966 series) #3 (31 de marzo de 1966)
in Marvel Super-Heroes (Marvel, 1967 series) #22 (September 1969)
in Marvel's Greatest Superhero Battles (Simon and Schuster, 1978 series) #[nn] (1978)
in Fantastiske Fire, De [Fantastiske Fire superseriepocket] (Atlantic Forlag, 1979 series) #1 (1979)
in Amazing Adventures (Marvel, 1979 series) #5 (April 1980) [pp 1-12], #6 (May 1980) [pp 13-24]
in The Marvel Saga (Marvel, 1985 series) #12 (November 1986)
in Marvel Masterworks (Marvel, 1987 series) #3 ([November] 1987)
in Uncanny X-Men Masterworks (Marvel, 1993 series) #1 (February 1993)
in X-Men: The Early Years (Marvel, 1994 series) #3 (July 1994)
in Marvel Special (Marvel Italia, 1994 series) #3 (Aprile 1995)
in Marvel Masterworks: The X-Men (Marvel, 1998 series) #[1] (December 1998)
in Essential Uncanny X-Men (Marvel, 1999 series) #1 (September 1999) [black & white reprint]
in Marvel Masterworks: The X-Men (Marvel, 2002 series) #1 (April 2002)
in The X-Men Omnibus (Marvel, 2009 series) #1 ([April] 2009)