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: Ci73
: Geological Maps & Plans
: Map
: Geological map of part of Devon and Cornwall including, Launceston, Callington.
: Geological map of part of Devon and Cornwall including, Launceston, Callington, Tavistock including cross section.
: Ordnance Survey Office
: 1912
: De la Beche, Sir H T.: Part of Devon and Cornwall including, Launceston, Callington, Tavistock
: 1912