Collects The X-Men (Marvel, 1963 series) #129-141; The Uncanny X-Men (Marvel, 1981 series) #142-143; X-Men Annual (Marvel, 1971 series) #4; Phoenix (Marvel, 1984 series) #1 and material from Marvel Treasury Edition (Marvel, 1974 series) #26-27 and Marvel Team-Up (Marvel, 1972 series) #100.
- Parts of this issue are reprinted:
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from The Uncanny X-Men (Marvel, 1981 series) #142 (February 1981), #142 (February 1981), #143 (March 1981), #143 (March 1981) -
from The X-Men (Marvel, 1963 series) #129 (January 1980), #129 (January 1980), #130 (February 1980), #130 (February 1980), #131 (March 1980), #131 (March 1980), #132 (April 1980), #132 (April 1980), #133 (May 1980), #133 (May 1980), #134 (June 1980), #134 (June 1980), #135 (July 1980), #135 (July 1980), #136 (August 1980), #136 (August 1980), #137 (September 1980), #137 (September 1980), #138 (October 1980), #138 (October 1980), #139 (November 1980), #139 (November 1980), #140 (December 1980), #140 (December 1980), #141 (January 1981), #141 (January 1981) -
from X-Men Annual (Marvel, 1970 series) #4 (1980), #4 (1980) -
from Marvel Team-Up (Marvel, 1972 series) #100 (December 1980) -
from Marvel Treasury Edition (Marvel, 1974 series) #26 (1980), #27 (1980) -
from Phoenix (Marvel, 1984 series) #1 (April 1984) -
from Phoenix (Marvel, 1984 series) #1 (April 1984), #1 (April 1984) which are reprinted-
from Phoenix (Marvel, 1984 series) #1 [Direct] (April 1984)