| A Mass path | Allen, Gregory | Article in Journal | | 2003 |
| Anny Stecker | Allen, Gregory | Article in Journal | | 2001 |
| Policemen in your family tree | Allen, Gregory | Article in Journal | | 1993 |
| Policemen in your family tree | Allen, Gregory | Article in Book | | 1993 |
| Roundwood Development Group 1964 | Allen, Gregory | Article in Journal | | 2002 |
| Sheep and shepherds | Allen, Gregory | Article in Journal | | 2003 |
| The blind bard of Belfast : Carl Gilbert Hardebeck (1869-1945) | Allen, Gregory | Article in Journal | | 1998 |
| The Gárda Síochána : policing independent Ireland, 1922-82 | Allen, Gregory | Monograph or Collective Volume | Gill & Macmillan | 1999 |