Columbia subject headings:
Harbors--Mediterranean Sea--History--Congresses.
Mediterranean Sea--Antiquities--Congresses.
Underwater archaeology--Mediterranean Sea--Congresses.
Harvard subject headings:
Harbors--Mediterranean Region--Congresses.
Mediterranean Region--Antiquities--Congresses.
Underwater archaeology--Mediterranean Region--Congresses.
Princeton subject headings:
Caesarea (Israel)--Antiquities--Congresses.
Harbors--Mediterranean Region--History--Congresses.
Underwater archaeology--Mediterranean Region--Congresses.