| Issue | #77 |
| Published | August 1972 |
| Cover Price | 0.20 USD |
| Pages | 36 |
| Editing | Stan Lee |
| Genre | superhero |
| Pencils | George Tuska |
| Inks | Vince Colletta |
| Reprinted | 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 | John Tartaglione |
| Letters | Sam Rosen |
| Reprinted | from X-Men (Marvel, 1963 series) #29 |