= пїЅпїЅпїЅпїЅпїЅпїЅ
      36 
      11  36

	[книга]
	Proceedings of 3rd International Congress of Speleology in Artificial Cavities Hypogea 2019, Dobrich, Bulgaria, 20-25 May 2019
	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
ISBN:	978-619-7526-01-1
	Геология - конференции Археология - конференции Спелеология Пещери

    Copyright 2001 - 2009, 2013, 2019 Public Library