"The Crimes of coal : … union labor's need of new methods in the non-union fields."; "United Mine Workers of America."; "Strikes and lockouts--Coal mining--United States.", "Violent crimes--United States.", "Coal miners--Labor unions--United States."; "1924"; "Journal article reprint from: World's Work, 1924:Apr."; ""; "P6093"; "pec"; "United Mine Workers of America.", "Violent crimes--United States.", "Coal miners--Labor unions--United States.", "Strikes and lockouts--Coal mining--United States."; "14256"; .