Columbia subject headings:
Church and state--Germany (West)
Church and state--Germany (West)--History--Sources.
Concordats.
Ecclesiastical law--Germany (West)
Germany (West)--Church history--Sources.
Germany--Church history--20th century--Sources.
Religion and state--Germany (West)
Harvard subject headings:
Concordats.
Ecclesiastical law--Germany (West)
Princeton subject headings: