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|a 978-92-1-117018-4
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|a Монгол Улсын Үндэсний номын сан
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|a United Nations Economic Commission for Europe
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| 245 |
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|a Best Practice Guidance for Effective Methane Drainage and Use in Coal Mines
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| 260 |
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|a Geneva
|b UN
|c 2010
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| 300 |
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|a 69p
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| 490 |
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|v Vol. 31
|x 1014-7225
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| 546 |
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|a English
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| 653 |
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|a economy
|a mining
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| 856 |
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|a printbook
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| 942 |
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|c BK
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