Columbia subject headings:
Coal miners--Pennsylvania--History--19th century.
Coal mines and mining--Pennsylvania--History--19th century.
Labor movement--Pennsylvania--History--19th century.
United States--History--Civil War, 1861-1865--Draft resisters.
Harvard subject headings:
Coal miners--Pennsylvania--History--19th century.
Coal mines and mining--Pennsylvania--History--19th century.
Labor movement--Pennsylvania--History--19th century.
United States--History--Civil War, 1861-1865--Draft resisters.
Princeton subject headings:
Coal miners--Pennsylvania--History--19th century.
Coal mines and mining--Pennsylvania--History--19th century.
Labor movement--Pennsylvania--History--19th century.
United States--History--Civil War, 1861-1865--Draft resisters.