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	[книга]
	Proceedings of 3rd International Congress of Speleology in Artificial Cavities Hypogea 2019, Dobrich, Bulgaria, 20-25 May 2019  / Ed. Alexey Zhalov et al
:	International Congress of Speleology in Artificial Cavities Hypogea, III. Dobrich. 2019    Zhalov, Aleksey Konstantinov редактор, и др. - Жалов, Алексей Константинов
	[Sofia] : Bulgarian Caving Society
	2019
	203 p. : Ill. ; 30 cm
	Други ред.: Vanyo Gyorev, Peter Delchev
ISBN:	978-619-7526-01-1
	551.44(063)+904:72(063)
	Геология - конференции Археология - конференции Спелеология Пещери

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	D22750
	2019012066 дп
	Депозит

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