Columbia subject headings:
Harvard subject headings:
Catholic Church--Bishops--Legal status, laws, etc.--Germany.
Catholic Church--Germany--Bishops--Legal status, laws, etc.
Loyalty oaths--Germany.
Princeton subject headings:
Bishops--Europe--History.
Bishops--Germany--History.
Church and state--Europe--History.
Church and state--Germany--History.
Oaths--Catholic Church.
Oaths--Europe.