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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Oldfield, R. | 1994 | Diving the Emerald Isle (July issue) | Magazine article | Diver | Details... |
| Oliver, G. | 1979 | Review: 'Living marine molluscs' by C.M. Yonge & T.E. Thompson | Journal | Ir. Nat. J. | Details... |
| Oliver, G.A. & Healy, B. | 1998 | Records of aquatic fauna from coastal lagoons in Ireland | Journal | Bull. Ir. biogeog. Soc. | Details... |
| Oliver, G.A. & McGrath, D. | 2006 | The amphipod Corophium insidiosum Crawford in Ireland | Journal | Ir. Nat. J. | Details... |
| Ordnance Survey of Northern Ireland | 1983 | The Irish grid | Report | | Details... |
| Orford, J.D. | 1989 | A review of the tides, currents and waves in the Irish Sea | Chapter | | Details... |
| Orford, J.D. & Carter, R.W.G. | 1982 | Geomorphological changes on the barrier coast of south Wexford | Journal | Ir. Geog. | Details... |
| Orr, J. | 1904 | Sea urchins | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Orr, T.L.L. | 1994 | Environmental awareness and offshore energy developments | Report | | Details... |
| Osbourne, D. & Berrow, S. | 1994 | Fin whale Balaenoptera physalus (L.) | Journal | Ir. Nat. J. | Details... |
| Ottway, B. | 1979 | Gracilaria foliifera an alga new to Ireland | Journal | Ir. Nat. J. | Details... |
| Ottway, B. & MacDonnacha, C. | 1980 | Gracilaria bursa-pastoris in Connemara | Journal | Ir. Nat. J. | Details... |
| Ottway, B., Parker, M., McGrath, D. & Crowley, M. | 1979 | Observations on a bloom of Gyrodinium aureolum Hulbert on the south coast of Ireland, summer 1976, associated with mortalities of littoral and sub-littoral organisms | Journal | Ir. Fish. Invest. | Details... |
| Pack-Beresford, H.D. | 1948 | Mussel colony | Journal | Ir. Nat. J. | Details... |
| Palmer, C.P. | 1979 | An introduction to the Scaphopoda | Published | | Details... |
| Palmer, C.P. | 1985 | An introduction to the Cephalopoda | Published | | Details... |
| Palmer, G. | 1954 | Notes on a dark-coloured example of the nursehound, Scyliorhinus stellaris (L) | Journal | Ir. Nat. J. | Details... |
| Palmer, J.A.S. | 1923 | Thracia pubescens near Dublin | Journal | Ir. Nat. | Details... |
| Parke, M. & Dixon, P.S. | 1964 | A revised checklist of British algae | Journal | J. Mar. Biol. Assoc. UK | Details... |
| Parke, M. & Dixon, P.S. | 1976 | Check-list of British marine algae - third revision | Journal | J. Mar. Biol. Assoc. UK | Details... |
3320 references found.