Columbia subject headings:
Exhibitions--Italy--History--19th century--Exhibitions.
Exhibitions--Italy--History--19th century.
Exhibitions--Italy--History--20th century--Exhibitions.
Exhibitions--Italy--History--20th century.
Trade shows--Italy--History--19th century--Exhibitions.
Trade shows--Italy--History--20th century--Exhibitions.
Trade shows--Italy--History.
Harvard subject headings:
Princeton subject headings:
Exhibitions--Italy--History--19th century.
Exhibitions--Italy--History--20th century.
Trade shows--Italy--History.