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