Columbia subject headings:
Agriculture--Italy--History.
Agriculture--Rome--History.
Italy--Antiquities.
Reclamation of land--Italy--History.
Reclamation of land--Rome--History.
Harvard subject headings:
Agriculture--Italy--History
Agriculture--Rome--History.
Italy--Antiquities.
Reclamation of land--Italy--History.
Reclamation of land--Rome--History.
Princeton subject headings:
Agriculture--Italy--History.
Agriculture--Rome.
Irrigation--Italy--History.
Irrigation--Rome.
Reclamation of land--Italy--History.
Reclamation of land--Rome.