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Preparation characteristics of coal from Nicholas County, W. Va.
Removing methane (degasification) from the Pittsburgh coalbed in northern West Virginia
Longwall mining with a German coal planer :Pocahontas No. 3 coalbed, Keystone, W. Va.
Preparation characteristics of coal from Kanawha County, W. Va.
Preparation characteristics of coal from Hancock, Brooke, Ohio, and Marshall counties, W. Va.
Preparation characteristics of coal from Fayette County, W. Va.
Carbonizing properties of coals from Fayette and Greenbrier counties, W. Va.
Preparation characteristics of coal from Clay, Gilmer, and Lewis counties, W. Va.
Carbonizing properties of coals from Nicholas, Randolph, and Webster counties, W. Va.