Columbia subject headings:
Harvard subject headings:
Germany--History--Revolution, 1848-1849.
Historical sociology.
Protest movements
Protest movements--Germany--History--19th century.
Social conflict--Methodology.
Social history
Princeton subject headings:
Germany--History--1815-1866.
Political violence--Germany--History--19th century.
Protest movements--Germany--History.
Social movements--Germany--History--19th century.