Columbia subject headings:
Becker, Josef, 1931-
Europe--Relations--Germany.
Germany--Foreign relations--1789-1900.
Germany--Foreign relations--20th century.
Germany--Relations--Europe.
Harvard subject headings:
Germany--Foreign relations--1789-1900.
Germany--Foreign relations--20th century.
Nationalism--Germany
Princeton subject headings:
Germany--Foreign relations--1789-1900.
Germany--Foreign relations--20th century.
Nationalism--Germany.