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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Boyd, H.L.E. | 1999 | Presidential excursion Strangford Lough, Co. Down Saturday 3 October | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Day, G. | 1999 | Slievenacloy, Co. Antrim: John O'Boyle, Stan Beesley and John Wilde | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Dick, J.T.A., MacNeil, C. & Anderson, R. | 1999 | The distribution of Crangonyx pseudogracilis Bousfield, 1958 (Crustacea: Amphipoda) in Northern Ireland, with notes on its ecology and behaviour | Journal | Ir. Nat. J. | Details... |
| Fox, H. | 1999 | Lichens from coastal habitats in NE Ireland | Unpublished | | Details... |
| McElherron, B.T. | 1999 | Donegore and Ballywee, Co. Antrim Tuesday 18 August | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| McElherron, B.T. | 1999 | Newry and Dromore, Co. Down Saturday 5 September: Claire Foley and Annie Given | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Nelson, B. | 1999 | The status and habitat of the Irish damselfly Coenagrion lunulatum (Charpentier)(Odonata) in Northern Ireland | Journal | Ent. Monthly Mag. | Details... |
| Nelson, B.H. & Anderson, R. | 1999 | Records of uncommon wetland beetles from N. Ireland, with particular reference to biodiversity and RDB list species | Journal | Coleopterist | Details... |
| Porley, R.D. | 1999 | Mosses and liverworts of the sandstone scarps of the Lough Navar Forest Region, Co. Fermanagh | Unpublished | | Details... |
| Preston, S.J. & Stone, R.E. | 1999 | Isothecium holtii Kindb., a new record in Co. Down (H38) | Journal | Ir. Nat. J. | Details... |
| Preston, S.J. & Stone, R.E. | 1999 | Masterwort Peucedanum ostruthium (L.) Koch in Glenelly, Co. Tyrone (H36) | Journal | Ir. Nat. J. | Details... |
| Russell, B.W. | 1999 | The Mournes Saturday 27 June: Peter Millar | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Russell, B.W. | 1999 | Mineral localities in east Co. Antrim Saturday 12 September: Rab Nawaz | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Scott, D. | 1999 | Northern Ireland Bird Report 1997 | Report | | Details... |
| Simms, M.J. | 1999 | Magheramorne Quarry, Co. Antrim | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Simms, M.J. | 1999 | South Co. Antrim Saturday-Sunday 15-16 August: Geological Report | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Thomlinson, P. | 1999 | Bird observatory, Light House Island, Copeland Islands, Co. Down: Neville McKee | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Thomlinson, P. | 1999 | Binevenagh, Co. Londonderry: David Riley | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Thomlinson, P. | 1999 | Fungus foray, Co. Antrim Saturday 10 October: David Mitchel | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Thomlinson, P. | 1999 | Lough Beg RSPB Reserve Sunday 11 October: Seamus Burns | Journal | Proc. Belf. Nat. Fld. Club | Details... |
3701 references found.