| A tour in Ireland, 1880-3 : the Second Battalion, the Worcestershire Regiment | Johnston, John | Article in Journal | | 1999 |
| An Irish county in 1630: the Muster Roll of county Monaghan | Johnston, John | Article in Journal | | 2010 |
| Hedge schools of Tyrone and Monaghan | Johnston, John | Article in Journal | | 1969 |
| The armed forces and the suppression of agrarian disorder during the Wellesley administration | Johnston, John Nicholas | Thesis | | 1993 |
| The Clogher valley as a social and economic region in the eighteenth and nineteenth centuries | Johnston, John Irwin Dickey | Thesis | | 1975 |
| The plantation of Co. Fermanagh, 1601-41 | Johnston, John D. | Thesis | | 1976 |