Vol.1 - X-MEN #94-131 and ANNUAL #3, and GIANT-SIZE X-MEN #1.
Vol.2 - THE X-MEN 132-141, ANNUAL 4-5, THE UNCANNY X-MEN 142-153, THE AVENGERS ANNUAL 10, MARVEL FANFARE 1-4, MARVEL TREASURY EDITION 26-27, MARVEL TEAM-UP 100, BIZARRE ADVENTURES 27 & PHOENIX: THE UNTOLD STORY 1
Vol.3 - UNCANNY X-MEN (1981) #154-175, X-MEN ANNUAL (1970) #6-7, MARVEL GRAPHIC NOVEL #5, WOLVERINE (1982) #1-4, SPECIAL EDITION X-MEN #1 and MAGIK (1983) #1-4.