Columbia subject headings:
Harvard subject headings:
France--Foreign relations--Germany.
France--History, Military--20th century.
Germany--Foreign relations--France.
Germany--History, Military--20th century.
World War, 1914-1918--France
World War, 1914-1918--Germany.
Princeton subject headings:
France--Relations--Germany.
Germany--Relations--France.
World War, 1914-1918--France.
World War, 1914-1918--Germany.