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Coal mining trends, approaches, and safety hazards: a brief review | SpringerLink
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Coal in NZ: Lets talk about coal
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Coal Country
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The US Coal Industry in the Nineteenth Century
coal mining | Definition, History, Types, & Facts | Britannica
Greenhouse Gas Emissions From Coal Mining Activities and Their Possible Mitigation Strategies - ScienceDirect
Sustainability | Free Full-Text | Sustainable Development of Resources and the Environment: Mining-Induced Eco-Geological Environmental Damage and Mitigation Measures—A Case Study in the Henan Coal Mining Area, China | HTML
