You can do simple searches using this form:

Type	Originator	Title	Date
	Burnham,R (ed)	Caves Cliffs and Canyons	2000
	MacInnes,H	Climb to The Lost World	1974
	Davies,W.T	Now and then vol 5	2010
	Mason,E.J	Portrait of the Brecon Beacons	1975
	Allaby,M	The Ordnance Survey Outdoor Handbook	1987
	Hoffman,L	The caves of Karst	1969