Columbia subject headings:
Germany--Politics and government--1888-1918.
Socialism--Germany--History.
Sozialdemokratische Partei Deutschlands.
Harvard subject headings:
Germany--Politics and government--1888-1918
Socialism--Germany
Socialism--Germany--History
Sozialdemokratische Partei Deutschlands
Princeton subject headings:
Germany--Politics and government--1888-1918.
Socialism--Germany--History.
Sozialdemokratische Partei Deutschlands.