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Geology
QE1-996.5
2
Arctic coal
1
coal
1
coal deposits
1
coal quality
1
coal-facies environments
1
metal content of coal
1
mineral resources base
1
multiple use of coal
1
prognostic resources
1
quality of coal
1
rare metals
1
stratigraphic distribution of coal formation
1
the Arctic zone of Russia
1
trace elements
1
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