1. Aguilar (Ravello) A.N. 1974 The Regional Geochemical Distribution Of Arsenic In Southwest England. PhD thesis, Imperial College, London.
2. Alderton D.H.M. 1993. Mineralization associated with the Cornubian Granite Batholith. In: Pattrick R.A.D. Polya D.A. (eds) Mineralization in the British Isles. Chapman & Hall, London, 270–354.
3. Trace elements in soils around the Hemerdon tungsten deposit, Devon; implications for exploration;Andrews;Proceedings of the Ussher Society,1987
4. Aspects of the geochemistry of bismuth in S.W. England;Ball;Proceedings of the Ussher Society,1982
5. Ball T.K. Tandy B.C. Turton K. 1990. Mineral Investigations Near Bodmin, Cornwall, Part 7 – New Occurrences at Quoit and Higher Trenowth. Mineral Reconnaissance Report, no. 110 , British Geological Survey.