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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Johnson, W.F. | 1901 | Cerastis ligula, Eep., at Poyntzpass, Ireland | Journal | Ent. Monthly Mag. | Details... |
| Lett, H.W. | 1901 | Mosses new to Ireland | Journal | Ir. Nat. | Details... |
| Lett, W.H. | 1901 | The occurrence of Natterer's bat and the whiskered bat in Co. Down | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Letts, E.A. & Blake, R.F. | 1901 | On a simple and accurate method for estimating the dissolved oxygen in fresh water, sea water, sewage effluents, &c. | Journal | Sci. Proc. R. D. S. | Details... |
| Orr, H. | 1901 | The common lizard in Antrim | Journal | Ir. Nat. | Details... |
| Patterson, R. | 1901 | Tawny owl in Co. Down | Journal | Ir. Nat. | Details... |
| Patterson, R. | 1901 | King-eider duck in Co. Down | Journal | Ir. Nat. | Details... |
| Patterson, R. | 1901 | Tawny owls in Co. Down | Journal | Ir. Nat. | Details... |
| Patterson, R. | 1901 | Tawny owl in Co. Antrim | Journal | Ir. Nat. | Details... |
| Patterson, R.L. | 1901 | Common dolphin in Belfast Lough | Journal | Ir. Nat. | Details... |
| Patterson, R.L. | 1901 | Smew on Lough Neagh | Journal | Ir. Nat. | Details... |
| Patterson, R.L. | 1901 | Monkfish in Belfast Lough | Journal | Ir. Nat. | Details... |
| Phillips, W.H. | 1901 | My hobby about ferns and its results: personal reminiscences | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Praeger, R.Ll. | 1901 | Irish hawkweeds | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1901 | Pyrola secunda refound in Ireland | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1901 | Spiranthes romanzoffiana in Antrim | Journal | Ir. Nat. | Details... |
| Praeger, R.Ll. | 1901 | Salix herbacea in County Antrim | Journal | Ir. Nat. | Details... |
| Rogers, W.M. | 1901 | Some north-east Ireland Rubi | Journal | Ir. Nat. | Details... |
| Thompson, S.M. | 1901 | On the supposed occurrence of a patch of white Lias or Rhaetic rock on the shore north of Macedon Point, Belfast Lough | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Waddell, C.H. | 1901 | Hieracium senescens Backh. in Ireland | Journal | Ir. Nat. | Details... |
3701 references found.