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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Welch, R.J. | 1898 | Helix limbata Drap., a Pyreneen shell introduced at Belfast | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1898 | Land Mollusca of Co. Tipperary | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1898 | Hydrobia jenkinsi Smith in Co. Down. | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1899 | Land and freshwater Mollusca of Clonbrock, Co. Galway | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1899 | Large colony of Vertigo antivertigo Drap. in Co. Down | Journal | J. Conch. (Lond.) | Details... |
| Welch, R.J. | 1900 | Reversed Helix ericetorum, at Bundoran | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1900 | Amphipeplea glutinosa Muller, in Ireland | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1900 | Abnormalities in the shell of Helix nemoralis | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1900 | Notes on the fauna of County Kerry | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Welch, R.J. | 1901 | Planorbis corneus in Co. Sligo | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1901 | Longevity of land Mollusca | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1902 | Additions to the list of Mollusca of Clonbrock | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1902 | Eggs of Arion hortensis | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1902 | Mollusca from shell-marl, Clonbrock, Co. Galway and Portaferry, Co. Down | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1902 | Some new stations for Mollusca | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1902 | Longford land and freshwater Mollusca | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1902 | Abnormal land Mollusca from Bundoran | Journal | Ir. Nat. | Details... |
| Welch, R.J. | 1902 | Scalariform Helix nemoralis | Journal | J. Conch. (Lond.) | Details... |
| Welch, R.J. | 1902 | Clausilia bidentata and Balea perversa in Ireland | Journal | J. Conch. (Lond.) | Details... |
| Welch, R.J. | 1902 | Scaliform Helix nemoralis | Journal | J. Conch. (Lond.) | Details... |
1505 references found.