Columbia subject headings:
Harvard subject headings:
Hydraulic engineering--Rome.
Rome--Politics and government.
Water use--Rome--History.
Water--Italy--Rome--Distribution--History.
Water-supply--Rome--History.
Princeton subject headings:
Hydraulic engineering--Rome.
Rome--Politics and government.
Water use--Rome--History.
Water--Italy--Rome--Distribution--History.
Water-supply--Rome--History.