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Type	Originator	Title	Date
	Cullingford,C.H.D	British Caving	1953
	Hartman,W	Die Hohlen Niederosterreichs (Band 2)	1982
	Murphy. P. D	Exploring the Limestone Landscapes of The Cumberland Ring (BCRA Cave Studies Series No 20)	2015
	Liegeios,P.G	Glossaire des Sciences Minerales
	Kunsky,J	Macocha A Moravsky Kras	1953
		Mountain Rescue and Cave Rescue	1969
	Gligan, M	Parcul National Retezat	2016
	Crisan,F (ed)	Retezat National Park	2016
	Oldham. T	The Caves of the Central Northern Outcrop	2008
	Univ.of Witwatersrand, Johannesburg (Occasional Paper 13)	The Lower South East of South Australia, A Karst Province	1975
	d'Arcy,G	The Natural History of the Burren	1992