Columbia subject headings:
Harvard subject headings:
Germany--Politics and government--1789-1900
Germany--Politics and government--20th century
Liberalism--Germany--History
Political scientists--Germany--Biography
Socialism--Germany--History
Socialists--Germany--Biography
Sozialdemokratische Partei Deutschlands--Biography.
Princeton subject headings:
Germany--Politics and government--1871-1933.
Liberalism--Germany--History.
Political parties--Germany--History.
Politicians--Germany--Biography.
Socialism--Germany--History.
Sozialdemokratische Partei Deutschlands--Biography.