Columbia subject headings:
Germany--Politics and government--1789-1900.
Germany--Politics and government--20th century.
Representative government and representation--Germany--History.
Sozialdemokratische Partei Deutschlands--History.
Harvard subject headings:
Germany--Politics and government--1789-1900--Congresses
Germany--Politics and government--20th century--Congresses.
Representative government and representation--Germany--History--Congresses.
Sozialdemokratische Partei Deutschlands--History--Congresses.
Princeton subject headings:
Germany--Politics and government--1789-1900.
Germany--Politics and government--20th century.
Representative government and representation--Germany--History.
Sozialdemokratische Partei Deutschlands--History.