Columbia subject headings:
Architecture, Domestic--Germany--Mülheim an der Ruhr.
Architecture--Germany--Mülheim an der Ruhr.
Mülheim an der Ruhr (Germany)--Buildings, structures, etc.
Harvard subject headings:
Princeton subject headings:
Architecture, Domestic--Germany (West)--Mühlheim an der Ruhr.
Architecture--Germany (West)--Mühlheim an der Ruhr.
Mülheim an der Ruhr (Germany)--Buildings, structures, etc.