Regulation of Coal Ranks of Contact Metamorphic Zone in Guanqiao Coal Field[J]. COAL GEOLOGY & EXPLORATION, 1984, 12(5): 18-23.
Citation: Regulation of Coal Ranks of Contact Metamorphic Zone in Guanqiao Coal Field[J]. COAL GEOLOGY & EXPLORATION, 1984, 12(5): 18-23.
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Regulation of Coal Ranks of Contact Metamorphic Zone in Guanqiao Coal Field

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