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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Lett, H.W. | 1885 | Rare mosses | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Lett, H.W. | 1887 | On the fungi collected in County Down in 1886 | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Lett, H.W. | 1890 | On the cells of mosses | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Lett, H.W. | 1892 | The warty newt (Molge cristata) in Co. Down | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1892 | St. MacErc's Cross, Donaghmore, Co. Down | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Lett, H.W. | 1893 | Sphagnum austini (Sull.) in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1894 | Fall of leaf of the holly | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1895 | Irish rat (Mus hibernicus Thomps.) at Lough Brickland, Co. Down | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1895 | Riccia glaucescens in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1896 | Lathraea squamaria in Co. Down | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1896 | Dryas octopetala in Co. Antrim | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1897 | The re-discovery of Dryas octopetala in the County Antrim | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Lett, H.W. | 1901 | Mosses new to Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1903 | Riccia glaucescens Carr. in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1903 | Archangelica officinalis in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1904 | Glyceria festucaeformis in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1904 | Glyceria festucaeformis in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1905 | Notes on some hepatics of Ulster | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1907 | Mosses in Ireland - a correction | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1908 | Ditrichum tortile (Schrad.) in Ireland | Journal | Ir. Nat. | Details... |
3701 references found.