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| [книга] |
| Proceedings of the X-th jubilee national conference with international participation of the open and underwater mining of minerals, June 07-11, 2009, International house of scientists Fr. J. Curie, Varna, Bulgaria |
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| Varna : Sci. and tech. union of mining geology and metallurgy |
| 2009 |
ISBN: | 978-954-92219-6-1 |
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