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| Royal Cornwall Polytechnic Society (1870): 38. Annual Report, pp. 30-31 |
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| [Specimen in the Natural History Museum, London] |
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| von Knorring, O., and Condliffe, E. (1984) On the occurrence of niobium-tantalum and other rare-element minerals in the Meldon aplite, Devonshire. Mineralogical Magazine, vol. 48, n° 348, 443-448.
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| www.mineralman.f9.co.uk (2001) http://www.mineralman.f9.co.uk/quarries/meldon.htm |
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| Russell, A. (1910): Mineralogical Magazine 15, 377-384 |
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| Rumsey, M. S., Savage, M. A. (2008) Mineralisation at North Devon United Mine, Peter Tavy, Devon. Uk Journal of Mines and Minerals 29, 49-52 |
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| Min Mag 21:116-205 |
VC Quarry, Isle of Lundy, Torridge, Devon, England, UK