Letters page replies by Chris Claremont.
in X-Men : l'intégrale (Panini France, 2003 series) #1977-1978 (mars 2004)
in Classic X-Men (Marvel, 1986 series) #12 (August 1987)
in The Official Marvel Index to the X-Men (Marvel, 1987 series) #5 (March 1988)
in El Asombroso Hombre Araña Presenta (Novedades, 1988 series) #55 (Mayo 4 de 1989)
in Marvel Masterworks (Marvel, 1987 series) #12 ([August] 1990)
in Essential X-Men (Marvel, 1996 series) #1 (1996)
in X-Men Classic (Marvel Italia, 1995 series) #4 (Gennaio 1996)
in Magneto Ascendant (Marvel, 1999 series) #1 (April 1999)
in Marvel Gold. La Imposible Patrulla-X (Panini España, 2011 series) #1 - Segunda Génesis (Abril 2011)Cover is a homage to the cover of X-Men (Marvel, 1963 series) #1.
in Atlantic special (Atlantic Förlags AB, 1981 series) #2/1981 (1981) [original title: The Gentleman's Name is Magneto]
in Classic X-Men (Marvel, 1986 series) #12 (August 1987)
in El Asombroso Hombre Araña Presenta (Novedades, 1988 series) #55 (Mayo 4 de 1989)
in Gli Incredibili X-Men (Edizioni Star Comics, 1990 series) #22 (Maggio 1992) [with the added pages]
in Marvel Masterworks (Marvel, 1987 series) #12 ([August] 1990)
in X-Men Classic (Marvel Italia, 1995 series) #3 (Dicembre 1995)
in Essential X-Men (Marvel, 1996 series) #1 (1996)
in X-Men Classic (Marvel Italia, 1995 series) #4 (Gennaio 1996)
in Magneto Ascendant (Marvel, 1999 series) #1 (April 1999)
in Marvel Gold. La Imposible Patrulla-X (Panini España, 2011 series) #1 - Segunda Génesis (Abril 2011)1st Muir Isle; 1st mention of Mutant X (Proteus)