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Carbonizing properties and petrographic composition of Taggart-bed coal from mines 30 and 31, Lynch, Harlan County, Ky. :and the effect of blending this coal with Pocahontas no. 3-and no. 4-bed coals

Carbonizing properties and petrographic composition of thick Freeport-bed coal from Harmar mine, Harmarville, Allegheny County, Pa. :and the effect of blending this coal with Pocahontas No. 3- and 4-bed coals

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.

Carbonizing properties of Powellton-bed coal from Coal Mountain mine, Guyan, Wyoming County, W. Va.


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