| Corpus genealogiarum Hiberniae, 1 | | Monograph or Collective Volume | Dublin Institute for Advanced Studies | 1962 |
| Fled Bricrenn | O'Brien, M. A. (Michael Alphonsus) | Article in Book | | 1959 |
| Irish origin-legends | O'Brien, M. A. (Michael Alphonsus) | Article in Book | | 1954 |
| Local traditions : place-names | O'Brien, M. A. (Michael Alphonsus) | Article in Book | | 1957 |
| Miscellanea Hibernica | O'Brien, M. A. (Michael Alphonsus) | Article in Journal | | 1938 |
| Old Irish personal names | O'Brien, M. A. (Michael Alphonsus) | Article in Journal | | 1973 |
| The Book of Leinster, formerly Lebar na Núachongbála. 5 vols. | | Monograph or Collective Volume | Institute for Advanced Studies | 1954 |
| The Old Irish life of St. Brigit | | Article in Journal | | 1939 |
| The oldest account of the raid of the Collas (circa A.D. 330) | | Article in Journal | | 1939 |