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UK | |
| BMS Newsletter 79, March 2010 (http://britishmicromountsociety.homestead.com/Gannell-Smelter.html) |
| Elton, N., Green, D., Hooper, J., Weiss, S. (2004) Famous British Mineral Localities: Greystone Quarry, Lezant, Cornwall. UK Journal of Mines and Minerals 24, Rockbottom Publications. 9-28 |