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Type	Originator	Title	Date
	Stummer,G	Atlas der Dachstein-Mammuthohle	1980
		Australian Speleological Federation, Proc of the 8th Bienn Conf	1972
		British Quarrying and Slag Federation, Members 1972	1972
	Pringle,J & George,T.Neville	British Regional Geology, South Wales	1948
	Mitchell, E	Journey to the Bottomless Pit	2004
	Marshall,D	Vercors Caves	1993