"West Virginia Department of Energy Division of Mines and Minerals memoranda."; "West Virginia. Department of Energy. Division of Mines and Minerals."; "Coal mines and mining--West Virginia."; "1986"; "

Mimeograph of typescript.

"; ""; "P19244"; "pec"; "Coal mines and mining--West Virginia.", "West Virginia. Department of Energy. Division of Mines and Minerals."; "14256"; .