Transactions of the Royal Geological Society of Cornwall, Vol8, p593 - 610
| Copper Mines in Ireland, the Knockmahon Mine, E of Bonmahon, Waterford, Henwood, W J, VIII, 593-610 |
| Copper Mines in Ireland, the Knockmahon Mine, E of Bonmahon, Waterford, Henwood, W J, VIII, 593-610 |