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| Day, Harry (1999) BMS Database, British Micromount Society. |
| Day, Harry (1999) BMS Database, British Micromount Society. |
| Day, Harry (1999) BMS Database, British Micromount Society. |
| Day, Harry (1999) BMS Database, British Micromount Society. |
| Day, Harry (1999) BMS Database, British Micromount Society. |
| Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London. Ineson, P.R. and Mitchell, J.G. (1974) K-Ar isotopic age determinations from some Lake District mineral localities. Geological Magazine, 111, 521-537. |
| Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London. Ineson, P.R. and Mitchell, J.G. (1974) K-Ar isotopic age determinations from some Lake District mineral localities. Geological Magazine, 111, 521-537. |
| Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London. Ineson, P.R. and Mitchell, J.G. (1974) K-Ar isotopic age determinations from some Lake District mineral localities. Geological Magazine, 111, 521-537. |
| Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London. Ineson, P.R. and Mitchell, J.G. (1974) K-Ar isotopic age determinations from some Lake District mineral localities. Geological Magazine, 111, 521-537. |
| Bridges, Trevor F., Green, David, Rumsey, Michael S., Leppington, C. Michael (2011) A review of the mineralisation of the Roughton Gill mines, Caldbeck Fells, Cumbria: Part 3 Roughton Gill Mine. Journal of the Russell Society, 14. 3-23 Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London. Ineson, P.R. and Mitchell, J.G. (1974) K-Ar isotopic age determinations from some Lake District mineral localities. Geological Magazine, 111, 521-537. |