You can do simple searches using this form:

Type	Originator	Title	Date
		10th International Congress of Speleology (Vol 2)	1989
	Taylor,M.R	Cave Passages	1996
	Davenport Adams,W. H	Famous caverns and grottoes	1886
	Houlez,J.P	Grottes et Avens du Pays de Saint-Guilhem	1998
	Verne,Jules	Journey to The Centre of the Earth	1996
	Gray,A, Taviner,R & Witcombe, R	Mendip Underground	2013
	Fabre,Guilhem	Observations sur les Circulations Soutr.Karst.du Languedoc Orient	1973
	Vasseur,Frank	Sur les Palmes d'Henri Lombard	1994
	Hardy. J	The Hidden Side of Swaledale	1988
	Price,D	Underwater Potholer	2015