Columbia subject headings:
Architecture--Germany--Rhineland--History--20th century.
Architecture--Germany--Rhineland.
Architecture--Germany--Ruhr (Region)
Architecture--Germany--Ruhr (Region)--History--20th century.
Expressionism (Architecture)--Germany--Rhineland.
Expressionism (Architecture)--Germany--Ruhr (Region)
Harvard subject headings:
Architecture, Modern--20th century--Germany--Rhineland.
Architecture, Modern--20th century--Germany--Ruhr (Region)
Architecture--Germany--Rhineland--History.
Architecture--Germany--Rhineland.
Architecture--Germany--Ruhr (Region)
Architecture--Germany--Ruhr (Region)--History.
Expressionism (Architecture)--Germany--Rhineland.
Expressionism (Architecture)--Germany--Ruhr (Region)
Princeton subject headings:
Architecture, Modern--20th century--Germany--Düsseldorf Region.
Architecture, Modern--20th century--Germany--Essen Region.
Düsseldorf Region (Germany)--Buildings, structures, etc.