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