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Type	Originator	Title	Date
	RGS (Geographical Journal Vol.129 Part 4)	A Preliminary Report on the Karst Morphology of the Nullarbor Plains by J.N Jennings
	RGS Geographical Magazine	Cavernous depths of Yorkshire	1972
	Willis,D	Caving Expeditions	1993
	RGS Geographical Magazine	Quest for Caves in High Nepal	1971
	RGS (Geographical Journal 120(4),pp.468-475)	Swallow Holes on the Millstone Grit and Carboniferous Limestone of the South Wales Coalfield	1954