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Analyses of West Virginia coals

Timbering regulations in certain coal mines of Pennsylvania, West Virginia, and Ohio

Comparison of storage-battery and cable-reel gathering locomotives in a West Virginia coal mine

Falls of roof and coal in mines operating in the Pittsburgh Coal Bed, Panhandle District, West Virginia

Falls of roof in mines operating in the Pittsburgh Coal Bed, West Virginia

Methods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and Ohio

Bleeder system in virgin area in a Pittsburgh coalbed mine

Selected geologic factors affecting mining of the Pittsburgh coalbed

Methods of determining the orientations of bedrock fracture systems in southwestern Pennsylvania and northern West Virginia

Coal mine floor heave in the Beckley coalbed,an analysis

Slickenside occurrence in coal mine roof of the Valley Camp no. 3 mine near Wheeling, W. Va.

Effects of horizontal stress related to stream valleys on the stability of coal mine openings


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