Columbia subject headings:
Germany--Politics and government--1789-1900.
Germany--Politics and government--20th century.
History--Philosophy.
Harvard subject headings:
Germany--Politics and government--1789-1900
Germany--Politics and government--20th century
History--Philosophy
Princeton subject headings:
Germany--Politics and government--1789-1900.
Germany--Politics and government--20th century.
History--Philosophy.