Columbia subject headings:
Germany--Politics and government--20th century.
Keil, Wilhelm, 1870-1968.
Representative government and representation--Germany--History--20th century.
Sozialdemokratische Partei Deutschlands--History.
Harvard subject headings:
Germany--Politics and government--1789-1900
Germany--Politics and government--20th century
Keil, Wilhelm, 1870-1968.
Princeton subject headings:
Germany--Politics and government--1789-1900.
Germany--Politics and government--20th century.
Keil, Wilhelm, 1870-1968.