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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Lett, H.W. | 1895 | Riccia glaucescens in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1900 | Sphagnum medium, Limpr., in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1901 | Mosses new to Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1902 | Mosses new to Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1903 | Riccia glaucescens Carr. in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1904 | A new hepatic | 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 | Mosses of Co. Dublin | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1908 | Ditrichum tortile (Schrad.) in Ireland | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1909 | A new Irish moss | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1910 | Irish Field Club Union: Rosapenna Conference. Mosses and hepatics | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1911 | Some differences between mosses and hepatics | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Lett, H.W. | 1913 | Notes on the flora of the Saltees 2. Mosses and hepatics | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1913 | Interesting hepatics from Co Kerry | Journal | Ir. Nat. | Details... |
| Lett, H.W. | 1914 | Musci | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Lett, H.W. | 1915 | Census Report on mosses of Ireland | Journal | Proc. Roy. Ir. Acad. | Details... |
| Lewis, F.J. | 1909 | Review: 'British mosses' by E. Fry | Journal | Ir. Nat. | Details... |
| Lewis, K. & Smith, A.J.E. | 1978 | Studies on some bulbiferous species of Pohlia section Pohliella. II. Taxonomy | Journal | J. Bryol. | Details... |
| Little, E.R.B. | 1967 | Fissidens celticus Paton, new to Ireland | Journal | Ir. Nat. J. | Details... |
428 references found.