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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Cochrane, J.C. & Clarke, R.S.J. | 1989 | Excursion: Northern Ireland Aquarium, Portaferry and archaeological sites in the area near the town | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Leach, S.J. | 1989 | Halimione portulacoides (L.) Allen in Co. Down | Journal | Ir. Nat. J. | Details... |
| McCormick, A.G. | 1989 | Isotopic studies on the eastern Mourne centre and other Tertiary acid igneous rocks of north-east Ireland | Ph.D. Thesis | | Details... |
| Nash, R. | 1989 | The musk beetle Aromia moschata in Co. Down | Journal | Ir. Nat. J. | Details... |
| Nunn, J.D. & McGrath, D. | 1989 | Rissoella globularis (Jeffries) (Mollusca: Gastropoda) in Ireland | Journal | Ir. Nat. J. | Details... |
| Rippey, I. | 1989 | Excursion: South Down | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| RSPB | 1989 | Arctic tern records for county Down | Unpublished | | Details... |
| RSPB | 1989 | Common tern records for county Down | Unpublished | | Details... |
| RSPB | 1989 | Roseate tern records for county Down | Unpublished | | Details... |
| RSPB | 1989 | Sandwich tern records for county Down | Unpublished | | Details... |
| Rutherford, B.M. | 1989 | Excursion: Parliament Buildings, Stormont | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Allen, D. | 1990 | A record of Diachrysia orichalcea (Fabr.) (Lepidoptera), slender burnished brass, from Co. Down | Journal | Ir. Nat. J. | Details... |
| Allen, M.D.B. & Boyd, T.D. | 1990 | Excursion: Killyleagh area | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Anwar, N.A., Richardson, C.A. & Seed, R. | 1990 | Age determination, growth rate and population structure of the horse mussel Modiolus modiolus | Journal | J. Mar. Biol. Assoc. UK | Details... |
| Beesley, S. & Clarkson, M. | 1990 | Excursion: Donaghadee | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Black, T. | 1990 | Excursion: Geology at Cultra | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Brown, B. | 1990 | Strangford | Journal | Mar. Cons. | Details... |
| Brown, R.A. | 1990 | Strangford Lough - the wildlife of an Irish Sea Lough | Book | | Details... |
| Brown, R.A. | 1990 | An introduction to Strangford Lough | Chapter | | Details... |
| Clarke, R.S.J. | 1990 | Excursion: Annalong and Kilkeel | Journal | Proc. Belf. Nat. Fld. Club | Details... |
1178 references found.