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- coal mine dump, combustion, environmental hazard 1
- Coal mining 2
- coal mining 6
- coal mining waste 3
- Coal mining; Forms of heavy metals; Environmental safety; Heaps; Geochemistry of lead. 1
- coal washing waste dumps, spontaneous firing, thermal field, thermal gradient 3
- coal, Lviv-Volyn coal basin, environment, mine dumps, toxicological indicators. 1
- COBRA 1
- cognitive 2
- cognitive activity 1
- cognitive abilities 1
- cognitive factors 1
- cognitive procedures 1
- cognitive structure of the omen 2
- collaboration 1
- collective 1
- collocate 1
- collocation 2
- color reactions 1
- colour nomination 1