| Apprenticeship in modern times | Ryan, J. G. | Article in Book | | 2000 |
| Clonmacnois | Ryan, J. | Article in Journal | | 1939 |
| Early Irish crafts and apprenticeships : an historical background | Ryan, J. G. | Article in Book | | 2000 |
| Ecclesiastical relations between Ireland and England in the 7th and 8th centuries | Ryan, J. | Article in Journal | | 1939 |
| Iroschottische Kirche | Ryan, J. | Article in Journal | | 1960 |
| Iroschottische mission | Ryan, J. | Article in Journal | | 1960 |
| Pre-Norman Dublin | Ryan, J. | Article in Journal | | 1949 |
| The battle of Clontarf | Ryan, J. | Article in Journal | | 1938 |
| The Cain Adomnain | Ryan, J. | Article in Book | | 1936 |
| The Chemical Association of Ireland, 1922-1936 : the foundation and activities of the Association with some contributions to the history of chemistry in Ireland taken from the archives of the Institute of Chemistry in Ireland | Ryan, J. Philip | Monograph or Collective Volume | Samton Ltd for the Institute of Chemists of Ireland | 1997 |
| The church at the end of the sixth century | Ryan, J. | Article in Journal | | 1951 |
| The early Irish church and the Holy See | Ryan, J. | Article in Journal | | 1960 |
| The excavation of a large earthen ring-fort at Garranes, Co. Cork | Ryan, J.Ó Ríordáin, S. P. | Article in Journal | | 1942 |
| The historical content of Caithreím Ceallachaín Chaisil | Ryan, J. | Article in Journal | | 1941 |
| The post-Reformation bishops of Kerry | O'Ryan, J. C. | Article in Journal | | 1997 |