Columbia subject headings:
Architecture, Modern--19th century.
Architecture, Modern--20th century.
Architecture--Illinois--Chicago.
Chicago (Ill.)--Buildings, structures, etc.
Harvard subject headings:
Architecture--Illinois--Chicago--Pictorial works.
Chicago (Ill.)--Buildings, structures, etc.--Pisctorial works.
Princeton subject headings:
Architecture--Illinois--Chicago.
Chicago (Ill.)--Buildings, structures, etc.