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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| O'Riordan, C.E. | 1985 | Review: 'Laois, an environmental history' by J. Feehan | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. & Bruton, T. | 1986 | Notes on the crania of the euphrosyne dolphin Stenella coeruleoalba (Meyen) in the collections of the National Museum of Ireland | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. & O'Connor, J.P. | 1985 | Notes on the collection of Porifera housed in the National Museum of Ireland, with provisional lists of contained putative types | Journal | Ir. Nat. J. | Details... |
| O'Riordan, S.P. | 1934 | Rock-cut souterrain at Brackcloon, Castletown Bere, Co. Cork | Journal | Ir. Nat. J. | Details... |
| O'Rourke, M. | 1991 | The Kowloon Bridge | Magazine article | SubSea | Details... |
| Orr, H.L. | 1925 | Notes on aculeates in possession of W.F. Johnson | Unpublished | | Details... |
| Page, C.N. | 1982 | The history and spread of bracken in Britain | Journal | Proc. Roy. Soc. Edinb. | Details... |
| Palmer, J.A.S. | 1923 | Thracia pubescens near Dublin | Journal | Ir. Nat. | Details... |
| Parkes, H.M. | 1953 | Some notes on the herbarium of University College, Cork | Journal | Ir. Nat. J. | Details... |
| Parkes, H.M. & Scannell, M.J.P. | 1970 | Anne E. Ball, two volumes of algae in herbarium, National Botanic Gardens, Dublin | Journal | Ir. Nat. J. | Details... |
| Patten, C.J. | 1908 | Links in man's ancestral chain | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Patterson, R.L. | 1894 | The common mussel (Mytilus edulis) in Belfast Lough | Journal | Ir. Nat. | Details... |
| Patterson, W.H. | 1869 | Some ancient tombstones at the Abbey Church of Movilla, Co. Down | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Patterson, W.H. | 1871 | Antiquities in SW Donegal | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Patterson, W.H. | 1873 | The capture of Carrickfergus by the French under M. Thurot, in February, 1760 | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Patterson, W.H. | 1891 | Ancient grave slabs near Dundonald | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Patterson, W.H. | 1894 | Shell-mounds at Rosapenna, North Donegal | Journal | Ir. Nat. | Details... |
| Pearson, G.W., Pilcher, J.R. & Baillie, M.G.L. | 1983 | High-precision 14-C measurement of Irish oaks to show the natural atmospheric 14-C variations from 200 BC to 4000 BC | Journal | Radiocarbon | Details... |
| Pearson, G.W., Pilcher, J.R., Baillie, M.G.L., Corbett, D.M. & Qua, F. | 1986 | High-precision 14-C measurement of Irish oaks to show the natural 14-C variations from AD 1840 to 5210 BC | Journal | Radiocarbon | Details... |
| Petersen, C.G.J. | 1918 | The sea bottom and its production of fish-food. A survey of the work done in connection with valuation of the Denmark waters from 1883-1917 | Journal | Rept. Danish Biol. Stat. | Details... |
938 references found.