Columbia subject headings:
Germany--History--Revolution, 1848-1849.
Germany--Politics and government--1848-1870.
Middle class--Germany--History.
Peasants--Germany--History.
Socialism--Germany--History.
Harvard subject headings:
Germany--History--Revolution, 1848-1849.
Germany--Politics and government--1848-1849.
Middle class--Germany--History--19th century.
Peasants--Germany--History--19th century.
Socialism--Germany--19th century.
Socialism--Germany--History--19th century
Princeton subject headings:
Germany--History--Revolution, 1848-1849.
Germany--Politics and government--1848-1849.
Middle class--Germany--History--19th century.
Peasants--Germany--History--19th century.
Socialism--Germany--History--19th century.