Columbia subject headings:
Germany--Foreign relations.
Germany--History--1789-1900.
Germany--History--20th century.
Germany--Politics and government--1789-1900.
Germany--Politics and government--20th century.
Hillgruber, Andreas.
Harvard subject headings:
Germany--Foreign relations--1871-
Germany--History--1789-1900.
Germany--History--20th century.
Germany--Politics and government--1789-1900
Germany--Politics and government--1871-
Germany--Politics and government--20th century
Hillgruber, Andreas.
Princeton subject headings:
Germany--Foreign relations--1871-
Germany--Politics and government--1871-