Carbonizing Properties and Petrographic Composition of Hazard No. 4 Coal from Columbus No. 4 Mine and High-temperature Carbonizing Properties of Hazard No. 7 Coal from Hardburly Mine, Perry County, Ky

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ืขื•ื“ ืžืืช Joseph Dana Davisโ€

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Carbonizing Properties of Velva Lignite from Ward County, N. Dak., and Monarch Coal from Sheridan County, Wyo
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