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Geology
3
QE1-996.5
coal
2
coal deposits
2
mineral resources base
2
prognostic resources
2
quality of coal
2
the Arctic zone of Russia
2
a coal map with metals
1
a mineral-raw base
1
coking coal
1
fossil fuels and energy resources
1
geochemical associations of metals
1
metal content of coal
1
precious metals
1
quality of coals
1
rare
1
rare metals
1
reserves
1
resources
1
trace elements
1
сoal deposits
1
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