You can do simple searches using this form:

Type	Originator	Title	Date
	Descent	Descent
	Orange Speleological Society	Descent
	Lucot,J.P & Quintilla,R	Descente Sportive, Gorges et Canyons	1995
	East Dorset Speleological Society	Indescent
	Casteret,N	The Descent of Pierre St Martin	1955