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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Dickinson, C.W. | 2000 | Excursion: Lecale area | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Donaldson, E.L. | 1964 | A short note on the entomology of Old Lighthouse Island | Journal | Ann. Rept. Copeland Bird Obs. | Details... |
| Doughty, P.S. | 1980 | Some trace fossils from the Silurian rocks of Co. Down | Journal | Ir. Nat. J. | Details... |
| Dove, R.S. | 1952 | Bird report from Co. Down, 1951 | Journal | Ir. Nat. J. | Details... |
| Dove, R.S. | 1956 | Further bird report from Ballykinlar, Co. Down | Journal | Ir. Nat. J. | Details... |
| Dresser, P.Q., Smith, A.G. & Pearson, G.W. | 1973 | Radiocarbon dating of the raised beach at Woodgrange, Co. Down | Journal | Proc. Roy. Ir. Acad. | Details... |
| Druce, G.C. | 1899 | Notes on the flora of the counties of Armagh, Down, Antrim and Derry | Journal | Ir. Nat. | Details... |
| Druce, G.C. | 1909 | Montia lamprosperma Cham. in County Down | Journal | Ir. Nat. | Details... |
| Druce, G.C. | 1910 | Irish carices | Journal | Ir. Nat. | Details... |
| Druce, G.C. | 1912 | Notes on Irish plants | Journal | Ir. Nat. | Details... |
| Dublin Microscopical Club | 1897 | Dublin Microscopical Club | Journal | Ir. Nat. | Details... |
| Dublin Microscopical Club | 1899 | Dublin Microscopical Club | Journal | Ir. Nat. | Details... |
| Dublin Microscopical Club | 1906 | Dublin Microscopical Club | Journal | Ir. Nat. | Details... |
| Dublin Naturalists' Field Club | 1903 | Dublin Naturalists' Field Club | Journal | Ir. Nat. | Details... |
| Dunleath | 1938 | Pink-footed geese in Co. Down, and spoonbill in Co. Londonderry | Journal | Ir. Nat. J. | Details... |
| Dunleath | 1945 | Carrion crow in Co. Down | Journal | Ir. Nat. J. | Details... |
| Dunleath | 1945 | Early arrival of wigeon and grey lag-geese in Co. Down | Journal | Ir. Nat. J. | Details... |
| Dunleath | 1948 | Black redstart in Co. Down | Journal | Ir. Nat. J. | Details... |
| Edwards, K.J. | 1978 | Palynology of buried soil horizons. Murlough National Nature Reserve Scientific Report | Report | | Details... |
| Ellis, R.J. | 1981 | Little auk at Murlough NNR | Journal | Ir. Nat. J. | Details... |
1178 references found.