Geological notes and details for 1:10000 sheets SW86NW and NE (combined, part), SW87NE, SW & SE, SW96NW (part) & NE (part) and SW97NW (part) & SW (part) (Trevose Head and St. Breock Downs) : [part of 1:50000 sheet 335/336 (Trevose Head/Camelford): British Geological Survey, Onshore Geology Series, Technical Report WA/92/11 / A.J.J. Goode and B.E. Leveridge with a contribution from R.W.O'B. KnoxBooks/Monographs
