Credits for Mary Jo Duffy on Spider-Man related comics and items from our database.
| Jul 1986 | Amazing Spider-Man (Vol. 1) #278 (Writer) |
| Sep 1979 | Daredevil (Vol.1) #160 (Editor) |
| Year 1982 | Incredible Hulk (Vol. 1) Annual #11 (Writer) |
| Jun 1979 | Power Man & Iron Fist #57 (Writer) |
| Jan 1979 | Spectacular Spider-Man (Vol. 1) #26 (Editor) |
| Feb 1979 | Spectacular Spider-Man (Vol. 1) #27 (Editor) |
| Aug 2002 | The Order #5 (Writer) |
| Sep 2002 | The Order #6 (Writer) |