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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Hardy, J.R. | 1897 | Coleoptera of Rathlin Island | Journal | Ir. Nat. | Details... |
| Harper, J.C. & Hartley, J.J. | 1938 | The Silurian inlier of Lisbellaw, Co. Fermanagh, with a note on the age of the Fintona beds | Journal | Proc. Roy. Ir. Acad. | Details... |
| Harris | 1744 | On the antient (sic) and present state of the county of Down | Book | | Details... |
| Harris, N. | 1937 | A petrological study of the Portrush sill and its veins | Journal | Proc. Roy. Ir. Acad. | Details... |
| Harris, W. | 1744 | The antient and present state of the county of Down | Book | | Details... |
| Harron, J. | 1970 | Recent records of plant distribution for the North-east of Ireland | Journal | Ir. Nat. J. | Details... |
| Harron, J. | 1974 | Carex elongata refound on Lough Neagh shores | Journal | Ir. Nat. J. | Details... |
| Harron, J. | 1980 | Letters and notes on Co. Londonderry plants | Letter | | Details... |
| Harron, J. | 1983 | Carex muricata L. ssp. lamprocarpa Celak in Co. Down | Journal | Ir. Nat. J. | Details... |
| Harron, J. | 1986 | Flora of Lough Neagh | Supplement | Ir. Nat. J. | Details... |
| Hart, G.V. | 1893 | Lepidoptera of the Londonderry district | Journal | Ir. Nat. | Details... |
| Hart, H.C. | 1896 | Flora of north-east Ireland | Journal | Ir. Nat. | Details... |
| Hart, H.C. & Barrington, R.M. | 1892 | Rediscovery of Rubus chamoemorus in Ireland | Journal | Ir. Nat. | Details... |
| Hart, W.E. | 1874 | Corydalis claviculata in Co. Derry | Journal | J. Bot. | Details... |
| Hart, W.E. | 1900 | Vanessa io in Co. Londonderry | Journal | Ir. Nat. | Details... |
| Hart, W.E. | 1901 | Peacock butterfly near Derry | Journal | Ir. Nat. | Details... |
| Hart, W.E. | 1902 | Wild swans in Donegal and Antrim | Journal | Ir. Nat. | Details... |
| Hart, W.E. | 1910 | Corydalis claviculata in Co. Derry | Journal | Ir. Nat. | Details... |
| Hartley, J.J. | 1932 | A sketch of the geology of north-west Tyrone | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Hartley, J.J. | 1933 | Notes on fossils recently obtained from the 'chloritic' conglomerate of Murlough Bay, Co. Antrim | Journal | Ir. Nat. J. | Details... |
3701 references found.