Columbia subject headings:
Catholic Church--Germany--History--20th century.
Church and state--Germany--History--20th century.
Germany--Church history--20th century.
Harvard subject headings:
Catholic Church--Germany (East)--History--20th century.
Church and state--Germany (East)--History--20th century.
Princeton subject headings:
Catholic Church--Germany--History--20th century.
Church and state--Germany--History--20th century.
Germany--Church history--20th century.