| A Gaelic grammarian | O'Donnell, Terence | Article in Journal | | 1952 |
| Between faded covers | O'Donnell, Terence | Article in Journal | | 1945 |
| Count Ó Donel proposes a coadjutor for the see of Raphoe, 1777 | O'Donnell, Terence | Article in Journal | | 1954 |
| Father Donagh Mooney, O. F. M. : the Franciscan convent of Donegal | O'Donnell, Terence | Article in Book | | 1959 |
| Father John Colgan, O.F.M., 1592-1658 : essays in commemoration of the third century of his death | | Monograph or Collective Volume | | 1959 |
| Fragmenta Rapotensiana : parish of Kilbarron | O'Donnell, Terence | Article in Journal | | 1957 |
| Franciscan Abbey of Multyfarnham | O'Donnell, Terence | Monograph or Collective Volume | The abbey | 1951 |
| Franciscan Donegal | O'Donnell, Terence | Article in Journal | | 1957 |
| Franciscan Donegal : a souvenir of the dedication of the Franciscan church, Ros Nuala, to the Immaculate Heart of Mary, on Sunday, 29th June, 1952 | NA | Monograph or Collective Volume | Franciscan Friary, Ros Nuala | 1952 |
| Gleanings in Donegal history | O'Donnell, Terence | Article in Journal | | 1964 |
| Lord Trimleston's advice to his son - a fragment | O'Donnell, Terence | Article in Journal | | 1964 |
| Napper Tandy and county Donegal | O'Donnell, Terence | Article in Journal | | 1968 |
| Other days in Donegal | O'Donnell, Terence | Article in Journal | | 1956 |
| Return to Donegal | O'Donnell, Terence | Article in Book | | 1952 |
| The Rosses : from the earliest times to 1640 | O'Donnell, Terence | Article in Journal | | 1976 |