Columbia subject headings:
Harvard subject headings:
Europe--Politics and government--1815-1871
Germany--History--1815-1866
Germany--History--1866-1871
Germany--Politics and government--1789-1900
Nationalism--Germany--History--19th century
Princeton subject headings:
Europe--Politics and government--History.
Europe--Relations--Germany--History.
Germany--Politics and government--History.
Germany--Relations--Europe--History.