Columbia subject headings:
Harvard subject headings:
Agricultural industries--Italy--Tuscany--History--19th century--Congresses.
Ricasoli, Bettino, 1809-1880--Congresses.
Wine industry--Italy--Tuscany--History--19th century.
Princeton subject headings:
Agricultural industries--Italy--Tuscany--History--19th century--Congresses.
Ricasoli, Bettino, 1809-1880--Congresses.
Wine industry--Italy--Tuscany--History--19th century.