"Collection of West Virginia Board of Coal Mine Health and Safety memoranda."; "West Virginia. Board of Coal Mine Health and Safety."; "Coal mines and mining--West Virginia.", "Coal mines and mining--West Virginia--Safety measures."; "1987-1991"; "

Collection.

"; ""; "P19245"; "pec"; "Coal mines and mining--West Virginia--Safety measures.", "Coal mines and mining--West Virginia.", "West Virginia. Board of Coal Mine Health and Safety."; "14255"; .