Columbia subject headings:
Harvard subject headings:
Drainage--Italy--Catania Region--History.
Irrigation--Italy--Catania Region--History.
Reclamation of land--Italy--Catania Region--History.
Princeton subject headings:
Drainage--Italy--Catania Region--History.
Irrigation--Italy--Catania Region--History.
Reclamation of land--Italy--Catania Region--History.