| Issue | #67 |
| Published | December 1970 |
| Cover Price | 0.25 USD |
| Pages | 52 |
| Editing | Stan Lee |
| Genre | superhero |
| Pencils | Marie Severin |
| Inks | Joe Sinnott |
| Letters | Morrie Kuramoto |
| Reprinted | in Marvel Masterworks: The X-Men (Marvel, 2003 series) #7; in Essential Classic X-Men (Marvel, 2006 series) #3 [black & white]; in X-Men (K. G. Murray, 1970 series) #2 |
| Genre | superhero |
| Script | Stan Lee |
| Pencils | Jack Kirby; Alex Toth |
| Inks | Vince Colletta |
| Letters | Sam Rosen |
| Reprinted | from X-Men (Marvel, 1963 series) #12 |
| Genre | superhero |
| Script | Stan Lee |
| Pencils | Jack Kirby; Werner Roth |
| Inks | Joe Sinnott |
| Letters | Sam Rosen |
| Reprinted | from X-Men (Marvel, 1963 series) #13 |