Columbia subject headings:
Germany--History--1871-
Germany--Politics and government--1871-
Prussia (Germany)--History--1870-
Harvard subject headings:
Germany--History--1871-
Germany--Politics and government--1871-
Prussia (Germany)--History--1870-
Princeton subject headings:
Germany--Politics and government--1871-1918.
Germany--Politics and government--20th century.
Prussia (Germany)--History.