= пїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅ - пїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅ
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	[книга]
	8-th international scientific conference SGEM 2008 Modern management of mine producing, geology and environmental protection, 16-20 June 2008
	International Scientific Conference Surveying, Geology, Ecology, Management, VIII. Albena. 2008
	[Sofia : STEF92 Technology]
	2008
ISBN:
:	Vol. 1.  ISBN 978-954-91818-1-4   Vol. 2.  ISBN 978-954-91818-1-4
	Екология - конференции Минно дело Геология - конференции

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