| Issue | #71 |
| Published | August 1971 |
| Cover Price | 0.15 USD |
| Editing | Stan Lee |
| Genre | superhero |
| Pencils | Jack Kirby ?; Werner Roth |
| Inks | Dick Ayers |
| Reprinted | from X-Men (Marvel, 1963 series) #20 (May 1966); in Marvel Masterworks: The X-Men (Marvel, 2003 series) #7; in Essential Classic X-Men (Marvel, 2006 series) #3 [black & white] |
| Genre | superhero |
| Script | Roy Thomas |
| Pencils | Werner Roth |
| Inks | Dick Ayers |
| Letters | Artie Simek |
| Reprinted | from X-Men (Marvel, 1963 series) #20 |