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Type	Originator	Title	Date
		British Palaeozic fossils	1969
	Laming,A	Lascaux, Paintings and Engravings	1959
	Zajicek,P & Hromas,J	Show caves of the czech republic	2013
	Caillault,S	Speleo dans le Vercors (Tome 2)	1999
	Caillault,S, Haffner,D, Krattinger,T & Delannoy,J.J	Speleo dans le Vercors (Tome 2)	1999
	Martinussen. B	Store Norske Spitsbergen Kulkompani	2005