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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| O'Sullivan, G. | 1983 | The intertidal fauna of Aughinish Island, Shannon, Co. Limerick | Journal | Ir. Nat. J. | Details... |
| O'Sullivan, W.M. | 1991 | The distribution of otters Lutra lutra within a major Irish river system, the Munster Blackwater catchment, 1988-90 | Journal | Ir. Nat. J. | Details... |
| Ogilby, J.D. | 1885 | Notes on some Irish fishes | Journal | Sci. Proc. R. D. S. | Details... |
| Pack-Beresford, D.R. | 1909 | On the distribution of woodlice in Ireland as known at the end of 1908 | Journal | Ir. Nat. | Details... |
| Pack-Beresford, D.R. & Foster, N.H. | 1913 | Additions to the distributional records of woodlice in Ireland till the end of 1912 | Journal | Ir. Nat. | Details... |
| Pack-Beresford, H.L. | 1907 | Contributions to a natural history of Lambay: Araneida | Journal | Ir. Nat. | Details... |
| Parke, M. & Dixon, P.S. | 1964 | A revised checklist of British algae | Journal | J. Mar. Biol. Assoc. UK | Details... |
| Parker, J.G. | 1984 | The distribution of the subtidal Amphipoda in Belfast Lough in relation to sediment types | Journal | Ophelia | Details... |
| Parker, M. | 1979 | Neomysis integer (Leach) (Crustacea: Mysidacea): records and distribution in Ireland | Journal | Ir. Nat. J. | Details... |
| Parker, M. | 1987 | Anaitides longipes Kinberg., 1866 (Polychaeta: Phyllodocidae): notes on nomenclature, identification, habitat and distribution | Journal | Ir. Nat. J. | Details... |
| Parkes, H.M. | 1975 | Records of Codium species in Ireland | Journal | Proc. Roy. Ir. Acad. | Details... |
| Parkes, H.M. & Scannell, M.J.P. | 1969 | A list of marine algae from the Wexford coast | Journal | Ir. Nat. J. | Details... |
| Patterson, R. | 1892 | Galathea strigosa on Co. Down coast | Journal | Ir. Nat. | Details... |
| Patterson, R. | 1904 | Irish Field Club Union: Sligo conference. Crustacea: Amphipoda and Isopoda | Journal | Ir. Nat. | Details... |
| Patterson, R. | 1906 | Centriscus scolopax in Irish waters | Journal | Ir. Nat. | Details... |
| Patterson, R.L. | 1904 | The common mussel in Belfast Lough | Journal | Ir. Nat. | Details... |
| Pearson, J. | 1904 | A rare copepod | Journal | Ir. Nat. | Details... |
| Pearson, J. | 1905 | A list of the marine Copepoda of Ireland. Part I: Littoral forms and fish parasites | Journal | Fish. Ir., Sci. Invest. | Details... |
| Pearson, J. | 1906 | A list of the marine Copepoda of Ireland. Part II: Pelagic species | Journal | Fish. Ir., Sci. Invest. | Details... |
| Pentland, G.H. | 1912 | Notes on the increase and decrease of some mammals, birds and insects in the county of Louth during the last fifty years | Journal | Ir. Nat. | Details... |
1055 references found.