Uncanny X-Men #151 1982
Uncanny X-Men #154 1982
Uncanny X-Men #156 1982
X-Men #90 1974
X-Men #97 1976
X-Men #96 1975 1st Appearance of Moira Mactaggert
X-Men #95 1975 Death of Thunderbird; Third appearance of Storm; Third appearance of Nightcrawler; Third appearance of Colossus; Fourth appearance of Wolverine
X-Men #11 1965
X-Men #29 1967 SUPER-ADAPTOID
X-Men #44 1968 Angel
X-Men #23 1966
X-Men #64 1970 First appearance of Sunfire
X-Men #60 1969 First appearance of Sauron (Alter Ego of Karl Lykos)
X-Men #25 1966 EL TIGRE
X-Men #103 1977
X-Men #34 1967
X-Men #74 1972
X-Men #67 1970
X-Men #93 1975
X-Men #36 1967
X-Men #30 1967
Uncanny X-Men #150 1981 (Newsstand Edition) Variant
X-Men #121 1979 First full appearance of Alpha Flight
X-Men #115 1978 Enter: Sauron!