References
- Duff , K.L. , McKirdy , A.P. and Harley , M.J. 1985 . New Sites for Old: a students’ guide to the geology of the east Mendips , 192 Peterborough : NCC .
- Keene , P. and Harley , M.J. 1987 . Burrator Dartmoor Landform Trail , 24 Peterborough : NCC .
- Nature Conservancy Council . 1987 . Earth Science Conservation 23 , 52 Peterborough : NCC .