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Type	Originator	Title	Date
	Fogg, P & T	Beneath our Feet, The caves & Limestone scenery of the North of Ireland	2001
	Nymeyer,R & Halliday,W.R	Carlsbad Cavern The Early Years	1991
	Warren,S	Cave Surveys from the Yorkshire Dales	2017
	Cazes,G et al.	Caving Technical Guide	2013
	Saar,R	Die Dachstein-Rieseneishohle	1955
	Sydney Speleological Society (SSS Occ paper No 18)	Doing the Grand Canyon Blackheath	2014
	Le Roux,T	Grottes et Gouffres en Charente Maritime
	Deflandre,G	Han sur Lesse et ses Grottes	1989
	Eyre,J	Its only a game	2004
	Corbel,J	Les karsts du nord ouest de l'Europe	1957
	Jahan,L	Magie des Gouffres	1993
		Minutes of the Proceedings of the Institute of Civil Engineers	1934
		National Parks in Focus	1991
	Ucko,P.J & Rosenfeld,A	Palaeolithic Cave Art	1967
		Salzburger Hohlenbuch (Band 4)	1985
	Broderick,Alan Houghton	The Abbe Breuil: Prehistorian	1963
	Balch,H.E	The Mendip caves	1947
	Bradford,E	The great siege	1966