Columbia subject headings:
Coal mines and mining--Pennsylvania--Pottsville Region--History.
Coal mines and mining--Pennsylvania--Wilkes-Barre Region--History.
Elite (Social sciences)--Pennsylvania--Pottsville--History--19th century.
Elite (Social sciences)--Pennsylvania--Pottsville--History--20th century.
Elite (Social sciences)--Pennsylvania--Wilkes-Barre--History--19th century.
Elite (Social sciences)--Pennsylvania--Wilkes-Barre--History--20th century.
Harvard subject headings:
Coal mines and mining--Pennsylvania--Pottsville Region--History.
Coal mines and mining--Pennsylvania--Wilkes-Barre Region--History.
Elite (Social sciences)--Pennsylvania--Pottsville--History--19th century.
Elite (Social sciences)--Pennsylvania--Pottsville--History--20th century.
Elite (Social sciences)--Pennsylvania--Wilkes-Barre--History--19th century.
Elite (Social sciences)--Pennsylvania--Wilkes-Barre--History--20th century.
Princeton subject headings:
Coal mines and mining--Pennsylvania--Pottsville Region--History.
Coal mines and mining--Pennsylvania--Wilkes-Barre Region--History.
Elite (Social sciences)--Pennsylvania--Pottsville--History--19th century.
Elite (Social sciences)--Pennsylvania--Pottsville--History--20th century.
Elite (Social sciences)--Pennsylvania--Wilkes-Barre--History--19th century.
Elite (Social sciences)--Pennsylvania--Wilkes-Barre--History--20th century.