Columbia subject headings:
Art--Italy--Milan--Exhibitions--History--20th century.
Art--Italy--Milan--Exhibitions--History--21st century.
Triennale di Milano (Milan, Italy)--History.
Harvard subject headings:
Art--Italy--Milan--Exhibitions--History--20th century.
Art--Italy--Milan--Exhibitions--History--21st century.
Triennale di Milano (Milan, Italy)--History.
Princeton subject headings: