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International Journal of Coal Geology - ScienceDirect
Coal: Anthracite, Bituminous, Coke, Pictures, Formation, Uses - Geology.com
Coal | Properties, Formation, Occurrence and Uses - Geology …
What is coal? | U.S. Geological Survey - USGS.gov
(PDF) Coal Formation and Geochemistry - ResearchGate
Coal Geology - an overview | ScienceDirect Topics
Coal Geology | Wiley Online Books
International Journal of Coal Geology - 期刊影响因子 5.48 - JCR 1 …
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