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| Cotterell, T. F., Green, D. I., Hubbard, N., Mason, J. S., Starkey, R. E., Tindle, A. G. (2011) The Mineralogy of Dolyhir Quarry, Old Radnor, Powys, Wales. UK Journal of Mines and Minerals 32, 5-61 Wolfe, M. (2000) Mineral news. UK Journal of Mines and Minerals 20, 4-6 |
Gwaith Yr Afon mine, Goginan, Trefeirig, Ceredigion, Wales, UK