Earth's Mightiest
Professor X is a Jerk! Archive
Earth's Mightiest
THE X-MEN #57-58: Havok gets his costume!
Earth's Mightiest
THE X-MEN #55 (1969): Roy Thomas Returns
Earth's Mightiest
AMAZING ADVENTURES #15 (1972)
Earth's Mightiest
THE X-MEN #40 (1968)
Earth's Mightiest
X-MEN #10: The First Appearance of Ka-Zar!
Earth's Mightiest
X-MEN #12-13: The Origin of Professor X and the First Appearance of Juggernaut! (1965)
Earth's Mightiest
X-MEN #7: The First Cerebro! (1964)
Earth's Mightiest
TALES OF SUSPENSE #49 (1964)
Earth's Mightiest
STRANGE TALES #120 (1964)
Earth's Mightiest