Columbia subject headings:
Architecture--Illinois--Chicago--Exhibitions.
Architecture--Illinois--Chicago--History--20th century--Exhibitions.
Architecture--Illinois--Chicago--History--Exhibitions.
Chicago (Ill.)--Buildings, structures, etc.--Exhibitions.
Harvard subject headings:
Architecture, Modern--20th century--Illinois--Chicago--Exhibitions.
Architecture--Illinois--Chicago--Exhibitions.
Architecture--Illinois--Chicago--History--20th century--Exhibitions.
Architecture--Illinois--Chicago--History--Exhibitions.
Chicago (Ill.)--Buildings, structures, etc.--Exhibitions.
Princeton subject headings:
Architecture, Modern--20th century--Illinois--Chicago--Exhibitions.