Columbia subject headings:
Conservatism--Germany--History--20th century.
Germany--Politics and government--1871-1933.
Liberalism--Germany--History--19th century.
Political parties--Germany--History--19th century.
Political parties--Germany--History--20th century.
Harvard subject headings:
Conservatism--Germany--History--20th century
Germany--Politics and government--1871-1933.
Liberalism--Germany--History--19th century
Political parties--Germany--History--19th century
Political parties--Germany--History--20th century
Princeton subject headings:
Political parties--Germany--History--Congresses.