Dartmoor: a description of the O.S. one-inch Dartmoor tourist map which corresponds to an area shown on parts of the O.S. one-inch sheets nos 175 (Okehampton), 176 (Exeter), 186 (Launceston), 187 (Plymouth) and 188 (Torquay)
Brunsden, Denys.
Sheffield The Geographical Association
1968
bibl p53-55
Geology