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= International Sci. Ses. Management Of Natural And Technogenic Risks. Sofia. 2001
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**1 1**
Title	Author(s)	ISBN	Year
Proceedings of the International scientific session Management of natural and technogenic risks, Sofia, 4-8 June 2001 [книга]	International Sci. Ses. Management Of Natural And Technogenic Risks. Sofia. 2001	954-9748-33-2	2001