Columbia subject headings:
Church and social problems--Germany--Rhine Province--History.
Germany--Church history--20th century.
Rhine Province (Germany)--Church history.
Harvard subject headings:
Church and social problems--Evangelische Kirche im Rheinland
Church and social problems--Germany--Rhineland--History--20th century.
Rhineland (Germany)--Church history--20th century.
Rhineland (Germany)--Social conditions.
Princeton subject headings: