Columbia subject headings:
Architecture, Modern--20th century--Exhibitions--History.
Architecture--Europe--History--20th century--Exhibitions.
Harvard subject headings:
Architecture, Modern--20th century--Exhibitions--History.
Architecture, Modern--20th century--Germany--Exhibitions--History.
Architecture--Europe--History--20th century--Exhibitions
Architecture--Europe--History--20th century--Exhibitions.
Princeton subject headings:
Architecture, Modern--20th century--Europe--Exhibitions--History.
Architecture, Modern--20th century--Exhibitions--History.