Columbia subject headings:
Catholic Church--Germany--Congresses.
Church and state--Catholic Church--Congresses.
Church and state--Germany--Congresses.
Harvard subject headings:
Catholic Church--Germany--Congresses.
Church and state--Catholic Church--Congresses
Church and state--Germany--Congresses.
Princeton subject headings:
Christian sociology--Catholic Church--Periodicals.
Church and state--Germany (West)--Periodicals.
Periodicals.