Condenses Giant-Size X-Men to fit in 32 pages, with new material on pages 1-4 and 18-32. The rest of the series reprints the original comics in their entirety.
in Marvel Masterworks (Marvel, 1987 series) #11 ([November] 1989)
in L' Uomo Ragno (Edizioni Star Comics, 1987 series) #52 (15 Luglio 1990)
in Essential X-Men (Marvel, 1996 series) #1 (1996)
in X-Men Vignettes (Panini France, 2008 series) #[nn] (septembre 2008)
in L' Uomo Ragno (Edizioni Star Comics, 1987 series) #53 (30 Luglio 1990)Inside front cover. Dated "3-20-86".
from Giant-Size X-Men (Marvel, 1975 series) #1 ([July] 1975) [pp. 5-17 only]
in L' Uomo Ragno (Edizioni Star Comics, 1987 series) #52 (15 Luglio 1990) [pp. 1-4], #53 (30 Luglio 1990) [pp. 2-16]
in X-Men: Rarities (Marvel, 1995 series) #[nn] (July 1995) [edited down to 16 pages of all Bolton material]
in X-Men Vignettes (Panini France, 2008 series) #[nn] (septembre 2008)
in X-Men: Original Sin (Marvel, 2008 series) #1 (December 2008) [edited]
from Giant-Size X-Men (Marvel, 1975 series) #1 ([July] 1975) [cover]Inside back cover.
in L' Uomo Ragno (Edizioni Star Comics, 1987 series) #53 (30 Luglio 1990)
in X-Men Vignettes (Panini France, 2008 series) #[nn] (septembre 2008)Back cover.