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Type	Originator	Title	Date
	Burman,J	Cango	1968
	Paloc,H	Carte Hydrogeologique des Grands Causses	1972
	Bastin,N & Duliere,J	Grottes de Han	1995
	Linsley,Ray K, Kohler,Max A & Paulhus,Joseph L	Hydrology for Engineers	1975
	Brook,D, Davies,G.M & Long, M.H	Northern Caves Vol 4A Scales Moor & Kingsdale	1983
	Davies,W.T	Now and Then Vol 3	2004
	Matthews,H	Penwyllt Village, Growth, Development and Decline [Dissertation]	1991
	Irwin,D.J	St Cuthberts Swallet	1991
	Hunt. C. J	The Lead Mines of the Northern Pennines	1984
	Balch,H.E	The caves of Mendip	1926