Columbia subject headings:
Barrages--Mediterranean Region--History--Congresses.
Dams--Mediterranean Region--History--Congresses.
Mediterranean Region--Antiquities--Congresses.
Harvard subject headings:
Barrages--Mediterranean Region--History--Congresses.
Dams--Mediterranean Region--History--Congresses.
Mediterranean Region--Antiquities--Congresses.
Princeton subject headings:
Barrages--Mediterranean Region--History--Congresses.
Dams--Mediterranean Region--History--Congresses.
Mediterranean Region--Antiquities--Congresses.