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  1. International Journal of Coal Geology - ScienceDirect

  2. Coal: Anthracite, Bituminous, Coke, Pictures, Formation, Uses - Geology.com

  3. Coal | Properties, Formation, Occurrence and Uses - Geology

  4. What is coal? | U.S. Geological Survey - USGS.gov

  5. (PDF) Coal Formation and Geochemistry - ResearchGate

  6. Coal Geology - an overview | ScienceDirect Topics

  7. Coal Geology | Wiley Online Books

  8. International Journal of Coal Geology - 期刊影响因子 5.48 - JCR 1 …

  9. 某些结果已被删除