Columbia subject headings:
Harvard subject headings:
Drainage--Rome--History--Congresses.
Hydraulic engineering--Rome--History--Congresses.
Hydrology--Italy--Congresses.
Irrigation--Italy--Congresses.
Irrigation--Rome--History--Congresses.
Landscape irrigation--Rome--History--Congresses.
Reclamation of land--Rome--History--Congresses.
Rome--Rural conditions--Congresses.
Water--Rome--Distribution--History--Congresses.
Princeton subject headings:
Drainage--Rome--History--Congresses.
Hydraulic engineering--Rome--History--Congresses.
Irrigation--Rome--History--Congresses.
Landscape irrigation--Rome--History--Congresses.
Reclamation of land--Rome--History--Congresses.
Rome--Rural conditions--Congresses.
Water--Rome--Distribution--History--Congresses.