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| Day, Harry (1999) BMS Database, British Micromount Society. |
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| 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.
Claringbull, G. F. (1951) New occurrences of duftite. Mineralogical Magazine and Journal of the Mineralogical Society, 29 (213) 609-614 doi:10.1180/minmag.1951.029.213.07
Davidson, W.F. and Thomson, N. (1951) Some notes on the minerals of Westmorland and Cumberland. North West Naturalist, 23 (for 1948), 136-154.
Kingsbury, A.W.G. and Hartley, J. (MS) (1951) New occurrences of rare minerals in the northern part of the English Lake District: part 1.
Russell, A. (1936) Notes on the occurrence of wulfenite at Brandy Gill, Cumberland, and of leadhillite at Drumruck Mine, Kirkcudbrightshire. Mineralogical Magazine, 24(153), 321-323. |
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| Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
Hartley, J. (1984) A list of minerals associated with the ore deposits of the Caldbeck Fells, Cumbria. Transactions of the Leeds Geological Association, 10 (3) 22-39
Dewey, Henry, Dines, H. G. (1923) Special Reports on the Mineral Resources of Great Britain Vol. 1, Tungsten and Manganese Ores (3rd ed.) Geological Survey of Great Britain
Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford, London. |
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| Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London. |
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| Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
Hartley, J. (1984) A list of minerals associated with the ore deposits of the Caldbeck Fells, Cumbria. Transactions of the Leeds Geological Association, 10 (3) 22-39
Davidson, W.F. and Thomson, N. (1951) Some notes on the minerals of Westmorland and Cumberland. North West Naturalist, 23 (for 1948), 136-154. |
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| Briscoe, P., McCallum, D., Nicholson, P. (2008) Mineralisation in the Upper Glenderamackin Valley, Mungrisdale, Cumbria. Uk Journal of Mines and Minerals 29, 23-34 |
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| Briscoe, P., McCallum, D., Nicholson, P. (2008) Mineralisation in the Upper Glenderamackin Valley, Mungrisdale, Cumbria. Uk Journal of Mines and Minerals 29, 23-34 |
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| Day, Harry (1999) BMS Database, British Micromount Society. |
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| Day, Harry (1999) BMS Database, British Micromount Society. |
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| Specimens in personal collection of Mark Willoughby. |
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| Day, Harry (1999) BMS Database, British Micromount Society. |
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Hard Rigg Edge, Ousby, Eden, Cumbria, England, UK