You can do simple searches using this form:

Type	Originator	Title	Date
	Jolfre,J	Au Coeur des Pyrenees	1993
	Palmer,R	Deep into Blue Holes	1989
	Czernhausen,W.C	Die Hohlen Salzburgs	1926
		El Karst de Rasines, Cantabria
		Hohlen & Hohlenkunde	1975
	Styles,S	Mountaineering	1954
	Seliscan,D	Pesteri din Romania (2D/3D)	2007
	Caillault,S	Speleo dans le Vercors (Tome 1)	1997
	Geological Magazine,Vol.9	The Drumlin Topography of South Donegal	1912
	Casteret,N	The darkness under the earth	1954