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Type	Originator	Title	Date
	Richards,A.J	A Gazetteer of the Welsh Slate Industry	1991
	Tazieff,H	Caves of Adventure	1953
	Tazieff,H	Caves of Adventure	1953
	Morrison,T.A	Cornwall's Central Mines, The Northern District 1810-1895	1980
	Morrison,T.A	Cornwall's Central Mines, The Southern District 1810-1895	1983
		Inventaire Speleologique du Doubs (Tome 1)	1988
	Acquaviva,G, Coulier,C, Pellegrin,A & P	Inventaire des Cavites du Massif de la Sainte Baume (Tome 1)
	Padgett,A & Smith,B	On Rope	1989
		Peak Rigging Guide	1995
	Middleton,J & Waltham,A	The Underground Atlas	1992