Comic Title: X-Men #21
Publisher: Marvel (Canam Publishers Sales Corp.)
Address: 625 Madison Avenue, New York, NY
Cover Date: June 1966
On Sale Date: April 5, 1966 Copyright Date April 5, 1966
Source: Library of Congress, Periodicals 1966

Frequency: Monthly
Cover Price: $0.12
Page Count: 32
Editor: Stan Lee

Title: "From Whence Comes... Dominus?"
Pages: 20

Feature(s):
X-Men

Writer: Roy Thomas
Penciller: Werner Roth
Inker: Dick Ayers
Letterer: Artie Simek

Reprinted In:
X-Men #72 (1971)
Super-Heroes #37 (1975)
Super-Heroes #38 (1975)
Marvel Masterworks Vol. 7:X-Men Vol. 2 HC (1989)
Essential Uncanny X-Men Vol. 1 TPB (1999)
Marvel Masterworks Vol. 7:X-Men Vol. 2 HC (2003)
Marvel Masterworks Vol. 7:X-Men Vol. 2 HC [Variant] (2003)
X-Men Omnibus Vol. 1 HC (2009)
X-Men Omnibus Vol. 1 HC [Variant] (2009)
Marvel Masterworks:The X-Men Vol. 2 TPB (2009)
Marvel Masterworks:The X-Men Vol. 2 TPB [Variant] (2009)
X-Men Epic Collection:Children of the Atom TPB (2015)

Feature Character(s)

• X-Men (chronology forthcoming)
• Professor X (chronology forthcoming)
• Cyclops (chronology forthcoming)
• Angel (chronology forthcoming)
• Beast (chronology forthcoming)
• Iceman (chronology forthcoming)
• Marvel Girl (chronology forthcoming)