Columbia subject headings:
Catholic Church--Foreign relations--France--History--20th century.
France--Foreign relations--Catholic Church--History--20th century.
Harvard subject headings:
Catholic Church--Foreign relations--France--History--20th century.
France--Foreign relations--Catholic Church--History--20th century.
Princeton subject headings:
Catholic Church--Foreign relations--France.
Europe--Politics and government--1918-1945.
France--Foreign relations--Catholic Church.
France--Politics and government--1914-1940.
Pius XII, Pope, 1876-1958.