Columbia subject headings:
Europe--Politics and government--1871-1918.
France--Foreign relations--Germany.
Germany--Foreign relations--France.
Harvard subject headings:
Europe--Politics and government--1871-1918.
France--Foreign relations--Germany.
Germany--Foreign relations--France.
Princeton subject headings:
Europe--Politics and government--1871-1918.
France--Foreign relations--Germany.
Germany--Foreign relations--France.