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	[книга]
	Proceedings of the International scientific session Management of natural and technogenic risks, Sofia, 4-8 June 2001
	International Sci. Ses. Management Of Natural And Technogenic Risks. Sofia. 2001
	Sofia : St. Ivan Rilski Publishing House
	2001
ISBN:	954-9748-33-2
	Минно дело Охрана на труда Безопасност на труда

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