Columbia subject headings:
Civilization, Ancient--Congresses.
Hydraulic structures--Mediterranean Region--History--Congresses.
Water--Government policy--Mediterranean Region--History--Congresses.
Water-supply--Mediterranean Region--History--Congresses.
Harvard subject headings:
Hydraulic structures--Mediterranean Region--History
Water--Government policy--Mediterranean Region--History--Congresses.
Water-supply--Mediterranean Region--History--Congresses.
Princeton subject headings:
Hydraulic structures--Mediterranean Region--History.
Water--Government policy--Mediterranean Region--History--Congresses.
Water-supply--Mediterranean Region--History--Congresses.