Columbia subject headings:
Chicago (Ill.)--History.
Chicago (Ill.)--Tours.
Historic buildings--Illinois--Chicago--Guidebooks.
Harvard subject headings:
Chicago (Ill.)--History.
Chicago (Ill.)--Tours.
Historic buildings--Illinois--Chicago--Guidebooks.
Princeton subject headings:
Chicago (Ill.)--History.
Chicago (Ill.)--Tours.
Historic buildings--Illinois--Chicago--Guidebooks.