Columbia subject headings:
Agricultural engineering--Italy--History.
Drainage--Italy--History.
Irrigation engineering--Italy--History.
Reclamation of land--Italy--History.
Harvard subject headings:
Agricultural engineering--Italy--History.
Drainage--Italy--History.
Irrigation engineering--Italy--History.
Reclamation of land--Italy--History.
Princeton subject headings:
Agricultural engineering--Italy--History.
Drainage--Italy--History.
Irrigation engineering--Italy--History.
Reclamation of land--Italy--History.