Columbia subject headings:
Catholic Church--Foreign relations--Germany.
Church and state--Germany--History--20th century.
Germany--Foreign relations--Catholic Church.
Germany--History--1918-1933.
Harvard subject headings:
Catholic Church--Foreign relations--Germany.
Church and state--Germany--History--20th century
Germany--Foreign relations--Catholic Church.
Germany--History--1918-1933.
Princeton subject headings:
Catholic Church--Foreign relations--Germany.
Church and state--Germany--History--20th century.
Germany--Foreign relations--Catholic Church.
Germany--History--1918-1933.