Columbia subject headings:
Nationalism and socialism--Germany--History.
Sozialdemokratische Partei Deutschlands--History.
Harvard subject headings:
Germany--Politics and government--1789-1900
Germany--Politics and government--20th century
Socialism--Germany--19th century.
Socialism--Germany--20th century.
Socialism--Germany--History--19th century
Socialism--Germany--History--20th century
Princeton subject headings:
Germany--Politics and government--1789-1900.
Germany--Politics and government--20th century.
Socialism--Germany--History--19th century.
Socialism--Germany--History--20th century.