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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Heal, H.G. | 1964 | Butterflies of the Belfast District in 1963 | Journal | Ir. Nat. J. | Details... |
| Kertland, M.P.M. | 1964 | Proposed Flora of County Armagh | Journal | Ir. Nat. J. | Details... |
| McGugan, A. | 1964 | Lower Cenomanian Foraminifera from Belfast Northern Ireland | Journal | Ir. Nat. J. | Details... |
| Meikle, R.D. | 1964 | Typescript Flora | Manuscript | | Details... |
| Nesbitt, L. | 1964 | Wildfowl count on Castledillon Lake, Co. Armagh, 1960-1963 | Journal | Ir. Nat. J. | Details... |
| Nesbitt, L. | 1964 | The heron count in Counties Armagh and East Tyrone, 1961-1963 | Journal | Ir. Nat. J. | Details... |
| Reid, R.E.H. | 1964 | The lower (Pre-Belemnitella mucronata) white limestone of the East and Northeast of County Antrim | Journal | Ir. Nat. J. | Details... |
| Reid, R.E.H. | 1964 | The lower (Pre-Belemnitella mucronata) white limestone of the east and northeast of County Antrim: Part 2 | Journal | Ir. Nat. J. | Details... |
| Robbie, J.A. | 1964 | The geology of Crow Glen, County Antrim | Journal | Ir. Nat. J. | Details... |
| Savage, R.J.G. | 1964 | Post glacial wild boar from Belfast Lough | Journal | Ir. Nat. J. | Details... |
| Smith, A.G. | 1964 | Problems in the study of the earliest agriculture in Northern Ireland | Chapter | | Details... |
| Stelfox, A.W. | 1964 | The arrival of Epilobium nerterioides Cunningham in the Mourne area of Co. Down | Journal | Ir. Nat. J. | Details... |
| Stelfox, A.W. | 1964 | Portland stone used as road metal in the Mourne Mountains, Co. Down! | Journal | Ir. Nat. J. | Details... |
| Stephens, N. & MacKay, M. | 1964 | The long winter of 1962-63, and the blizzards of 5th-7th February 1963, in Northern Ireland | Journal | Ir. Nat. J. | Details... |
| Wilson, R.L. | 1964 | The Tertiary dykes of Magho Mountain, Co. Fermanagh | Journal | Ir. Nat. J. | Details... |
| Wright, W.S. | 1964 | Catalogue of Macro-Lepidoptera in Northern Ireland | Book | | Details... |
| Boyd, T.D. | 1965 | Oxford ragwort, Senecio squalidus L., in Northern Ireland | Journal | Ir. Nat. J. | Details... |
| Carrothers, E.N. | 1965 | Sisyrinchium angustifolium in Co. Antrim | Journal | Ir. Nat. J. | Details... |
| Cobbing, E.J., Manning, P.I. & Griffith, A.E. | 1965 | Ordovician-Dalradian unconformity in Tyrone | Journal | Nature | Details... |
| Ennis, T. | 1965 | The arrival and spread of the collared dove (Streptopelia decaocto) in Northern Ireland | Journal | Ir. Nat. J. | Details... |
3701 references found.