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Type	Originator	Title	Date
	Landless,J.G	A Gazetteer to The Metal Mines of Scotland (Occ.P. No 1)	1993
	Courbon,P, Chabert,C.B, Osted,P & Lindsley,K	Atlas Great Caves of the World	1989
	Willis,D	Caving Expeditions	1993
	Willis,D	Caving Expeditions	1993
	Lansing,A	Endurance	1961
	Proudlove. G. S	Essential Sources in Cave Science (BCRA Cave Studies 16)	2015
	Aucant,Y, Schmitt,C & Urlacher,J.P	Le Verneau Souterrain	1985
	Habe,F	The Postojna Grottoes	1974