Columbia subject headings:
Genoa (Italy)--Commerce--Italy--Tuscany--History--14th century.
Merchants--Italy--Genoa--History--14th century.
Merchants--Italy--Tuscany--History--14th century.
Harvard subject headings:
Commerce--History--Medieval, 500-1500
Genoa (Italy)--Commerce--History.
Merchants--Italy--Tuscany--History.
Princeton subject headings:
Commerce--History--Medieval, 500-1500.
Genoa (Italy)--Commerce--History.
Merchants--Italy--Tuscany--History.