from The X-Men (Marvel, 1963 series) #1 (September 1963)
in The X-Men Omnibus (Marvel, 2009 series) #1 ([April] 2009)
from The X-Men (Marvel, 1963 series) #1 (September 1963)
from The X-Men (Marvel, 1963 series) #1 (September 1963)1st appearance of X-Men and Magneto
from The X-Men (Marvel, 1963 series) #2 (November 1963)
from The X-Men (Marvel, 1963 series) #2 (November 1963)
from The X-Men (Marvel, 1963 series) #3 (January 1964)
from The X-Men (Marvel, 1963 series) #3 (January 1964)vs. Blob 1st
from The X-Men (Marvel, 1963 series) #4 (March 1964)
from The X-Men (Marvel, 1963 series) #4 (March 1964)1st appearances of Quicksilver, Scarlet Witch, Toad, and Mastermind
from The X-Men (Marvel, 1963 series) #5 (May 1964)
from The X-Men (Marvel, 1963 series) #5 (May 1964)
from The X-Men (Marvel, 1963 series) #6 (July 1964)
from The X-Men (Marvel, 1963 series) #6 (July 1964)with Sub-Mariner
from The X-Men (Marvel, 1963 series) #7 (September 1964)
from The X-Men (Marvel, 1963 series) #7 (September 1964)
from The X-Men (Marvel, 1963 series) #8 (November 1964)
from The X-Men (Marvel, 1963 series) #8 (November 1964)1st appearance of Unus
from The X-Men (Marvel, 1963 series) #9 (January 1965)
from The X-Men (Marvel, 1963 series) #9 (January 1965)with Avengers
from The X-Men (Marvel, 1963 series) #10 (March 1965)
from The X-Men (Marvel, 1963 series) #10 (March 1965)1st Silver Age appearance of Ka-Zar