Mineral resource information in support of national, regional and local planning : Devon (comprising Devon, Plymouth, Torbay, Dartmoor National Park and part of Exmoor National Park): British Geological Survey report CR/05/096N / A.J. Bloodworth, G.E. Norton, CJ Mitchell, RC Srivener, D.G. Cameron, S.F. Hobbs, D.J. Evans, G.K. Lott and D.E. HighleyBooks/Monographs
