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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Belfast Naturalists' Field Club | 1909 | Belfast Naturalists' Field Club | Journal | Ir. Nat. | Details... |
| Belfast Naturalists' Field Club | 1909 | Summer Session: Dundrum | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Belfast Naturalists' Field Club | 1909 | Summer Session: Giant's Causeway | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Belfast Naturalists' Field Club | 1909 | Summer Session: Belvoir Park | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Belfast Naturalists' Field Club | 1909 | Lissanoure Castle | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Belfast Naturalists' Field Club | 1909 | Summer Session: Lagan Canal | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Campbell, D.C. | 1909 | Turtle dove near Londonderry | Journal | Ir. Nat. | Details... |
| Campbell, D.C. | 1909 | Wood wren at Londonderry | Journal | Ir. Nat. | Details... |
| Campbell, D.C. | 1909 | Glossy ibis in Cos. Donegal and Derry | Journal | Ir. Nat. | Details... |
| Davies, J.H. | 1909 | Bryological notes from Counties Down and Louth | Journal | Ir. Nat. | Details... |
| Davies, J.H. | 1909 | Barbula hornschchiana in Counties Down and Armagh | Journal | Ir. Nat. | Details... |
| Davies, J.H. | 1909 | Archidium alternifolium in County Down - a correction | Journal | Ir. Nat. | Details... |
| Druce, G.C. | 1909 | Montia lamprosperma Cham. in County Down | Journal | Ir. Nat. | Details... |
| Dublin Microscopical Club | 1909 | Dublin Microscopical Club | Journal | Ir. Nat. | Details... |
| Farran, G.P. | 1909 | Nudibranchiate Mollusca of the trawling grounds of the east and south coasts of Ireland | Journal | Fish. Ir., Sci. Invest. | Details... |
| Farran, G.P. | 1909 | Plaice marking experiments on the east coast of Ireland in 1905 and 1906 | Journal | Fish. Ir., Sci. Invest. | Details... |
| Gallway, W.H. | 1909 | A summer's dredging in Belfast Lough | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Gray, W. | 1909 | A gossiping geological speculation on Cave Hill | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Johnson, W.F. | 1909 | Cichorium intybus and Mimulus guttatus in Co. Armagh | Journal | Ir. Nat. | Details... |
| Langtry, R.L. | 1909 | A summer fieldfare in Co. Down | Journal | Ir. Nat. | Details... |
3701 references found.