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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Friend, H. | 1893 | The earthworms of Ireland | Journal | Ir. Nat. | Details... |
| Friend, H. | 1893 | The earthworms of Ireland | Journal | Ir. Nat. | Details... |
| Friend, H. | 1893 | The earthworms of Ireland | Journal | Ir. Nat. | Details... |
| Friend, H. | 1893 | The earthworms of Ireland | Journal | Ir. Nat. | Details... |
| Friend, H. | 1894 | A new Irish earthworm | Journal | Ir. Nat. | Details... |
| Friend, H. | 1895 | A new form of Irish earthworm | Journal | Ir. Nat. | Details... |
| Friend, H. | 1896 | The earthworms of Ireland | Journal | Ir. Nat. | Details... |
| Friend, H. | 1896 | Irish freshwater worms | Journal | Ir. Nat. | Details... |
| Friend, H. | 1896 | Freshwater annelids: an appeal | Journal | Ir. Nat. | Details... |
| Friend, H. | 1896 | Notes on the fauna and flora of Clonbrock, Co. Galway: earthworms | Journal | Ir. Nat. | Details... |
| Friend, H. | 1897 | Field days in Ulster 1. The sloblands of Belfast | Journal | Ir. Nat. | Details... |
| Friend, H. | 1897 | Field days in Ulster II. Antrim and Coleraine | Journal | Ir. Nat. | Details... |
| Friend, H. | 1897 | Annelids new to Ireland | Journal | Ir. Nat. | Details... |
| Friend, H. | 1897 | The tube-forming worms | Journal | Ir. Nat. | Details... |
| Friend, H. | 1898 | Irish annelids | Journal | Ir. Nat. | Details... |
| Friend, H. | 1898 | New Irish annelids | Journal | Ir. Nat. | Details... |
| Friend, H. | 1899 | Irish worms wanted | Journal | Ir. Nat. | Details... |
| Friend, H. | 1902 | Studies in Irish enchytraeids | Journal | Ir. Nat. | Details... |
| Friend, H. | 1910 | Luminous worms in Ireland | Journal | Ir. Nat. | Details... |
| Friend, H. | 1910 | The habits of worms | Journal | Ir. Nat. | Details... |
142 references found.