Marvel
The X-Men Omnibus #1 [Alex Ross Cover]
published April 2009
as [untitled] [Letters Page on Interior Page(s)]
X-Men: Children of the Atom #[2]
published January 2019
Mighty Marvel Masterworks: The X-Men #3 [unnamed variant]
published January 2023
Fantastic! #53 published February 1968
The Official Marvel Index to the X-Men #2 published July 1987
Marvel Milestone Edition: X-Men #28 #[nn] published November 1994
Marvel Masterworks: The X-Men #[3] published January 2002
Marvel Masterworks: The X-Men #[3] published January 2002
Essential Classic X-Men #2 published January 2006
The X-Men Omnibus #1 [Alex Ross Cover] published April 2009
Marvel Special #12 published November 1997
Fantastic! #52 published February 1968
The X-Men #76 [U.S. Cover Price] published June 1972
Marvel Milestone Edition: X-Men #28 #[nn] published November 1994
Marvel Masterworks: The X-Men #[3] published January 2002
Essential Classic X-Men #2 published January 2006
The X-Men Omnibus #1 [Alex Ross Cover] published April 2009