Columbia subject headings:
Harvard subject headings:
Catholic Church--Austria--History--20th century.
Catholic Church--Europe--History--20th century.
Catholic Church--Germany--History--20th century.
Church and state--Austria--History--20th century.
Church and state--Europe--History--20th century.
Church and state--Germany--History--20th century
Princeton subject headings:
Catholic Church--Austria--History--20th century.
Catholic Church--Germany--History--20th century.
Europe--History--1918-1945.