Columbia subject headings:
Harvard subject headings:
Catholic Church--Foreign relations--France.
Catholic Church--Foreign relations.
France--Foreign relations--Catholic Church.
Pius XI, Pope, 1857-1939
Pius XII, Pope, 1876-1958.
Princeton subject headings:
Catholic Church--Foreign relations--France.
Catholic Church--Foreign relations.
France--Foreign relations--Catholic Church.
Pius XI, Pope, 1857-1939.
Pius XII, Pope, 1876-1958.