Columbia subject headings:
Florence (Italy)--Economic conditions.
Florence (Italy)--History--To 1421.
Grain--Prices--Italy--Florence--History.
Harvard subject headings:
Florence (Italy)--Economic conditions.
Florence (Italy)--History--To 1421
Grain--Prices--Italy--Florence--History.
Princeton subject headings:
Economic history--Medieval, 500-1500.
Florence (Italy)--Economic conditions.
Florence (Italy)--History--To 1421.
Grain--Prices--Italy--Florence--History.