Columbia subject headings:
Europe--Politics and government--1918-1945.
France--Foreign relations--Germany.
Germany--Foreign relations--France.
Peace movements--France.
Peace movements--Germany.
Harvard subject headings:
France--Foreign relations--Germany.
Germany--Foreign relations--France.
Peace movements--France--History--20th century.
Peace movements--Germany--History--20th century.
World War, 1914-1918--Peace
Princeton subject headings: