Coal. Carbonizing properties and petrographic composition of Powellton-bed coal from Elk Creek no. 1 mine, Emmett, Logan County, W. Va., and effect of blending this coal with Pocahontas no. 3-and no. 4-bed coals; by J. D. Davis, D. A. Reynolds, G. C. Sprunk, and C. R. Holmes.

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