Columbia subject headings:
Florence (Italy)--Commerce--History--To 1500.
Florence (Italy)--History--To 1500.
Guilds--Italy--Florence--History.
Harvard subject headings:
Florence (Italy)--Commerce--History.
Guilds--Italy--Florence--History.
Merchants--Italy--Florence--History.
Princeton subject headings:
Florence (Italy)--Commerce--History--To 1500.
Florence (Italy)--History--To 1500.
Guilds--Italy--Florence--History.