Columbia subject headings:
Harvard subject headings:
Poor--Germany--History.
Poor--Germany--Political activity--History.
Poor--Political activity--Germany--History.
Social conflict--Germany--History.
Social movements--Germany--History.
Princeton subject headings:
Poor--Germany--History--18th century.
Poor--Germany--History--19th century.
Poor--Political activity.
Proletariat.
Social conflict.
Social movements--Germany--History--18th century.
Social movements--Germany--History--19th century.