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Type	Originator	Title	Date
	Gill,D.W & Beck,J.S	Caves of the Peak District (1991)	1991
	Audra,P (ed)	Grottes & Karsts de France	2010
	Houlez,J.P	Grottes et Avens du Pays de Saint-Guilhem	1998
	Greaves,H	Hong Meigui Yunnan 2002	2002
	Waltham,A.C, Simms,M. J, Farrant,A. R & Goldie. H.S	Karst & Caves of Great Britain	1997
	Club Loisirs et Plein Air (Explokarst No 3 1992)	La Montagne de la Seranne	1992
	Forder, J & E	Secrets of the Moors and Dales	1992
	Institute of Geography, Brno	Speleologicky Vestnik	1973
	Oldham. T	The Caves of Clydach	1981
	Coase,A.C	The Geomorphology of the Dan yr Ogof Caves	1975
	Bogli,A	Zauber der hohlen	1976