in Los Hombres X (Editora de Periódicos La Prensa S.C.L., 1966 series) #46 (Octubre 31 de 1969)
in The Official Marvel Index to the X-Men (Marvel, 1987 series) #3 (September 1987)
in Marvel Masterworks: The X-Men (Marvel, 2003 series) #5 ([August] 2005)
in The X-Men Omnibus (Marvel, 2009 series) #2 ([April] 2011)Possible Romita ink credit by Nick Caputo.
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). Rosen credits per Nick Caputo, June 2012.
Sal Buscema is credited with pencils, and John Romita with inks, in The Official Marvel Index to the X-Men (1987), The Official Marvel Index to the X-Men (1994), and Official Index to the Marvel Universe.
in HIP Comics (Classics/Williams, 1966 series) #19130 (1969)
in Los Hombres X (Editora de Periódicos La Prensa S.C.L., 1966 series) #46 (Octubre 31 de 1969)
in Marvel Special (Marvel Italia, 1994 series) #16 (Marzo 1999)
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 particularization of Heck pencils 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).
in HIP Comics (Classics/Williams, 1966 series) #19130 (1969)
in Los Hombres X (Editora de Periódicos La Prensa S.C.L., 1966 series) #46 (Octubre 31 de 1969)
in Amazing Adventures (Marvel, 1979 series) #11 (October 1980)
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)Includes a letter from Tony Isabella