Columbia subject headings:
Church and state--Germany--Ronsdorf (Wuppertal)--History.
Reformed Church--Germany--Ronsdorf (Wuppertal)--History.
Ronsdorf (Wuppertal, Germany)--Church history.
Harvard subject headings:
Church and state--Germany--Ronsdorf (Wuppertal)--History.
Ronsdorf (Wuppertal, Germany)--Church history.
Wuppertal (Germany)--Church history.
Princeton subject headings: