Columbia subject headings:
Harvard subject headings:
Genoa (Italy)--Antiquities.
Harbors--Italy--Genoa--History.
Harbors--Italy--Liguria--History.
Liguria (Italy)--Antiquities.
Underwater archaeology--Italy--Genoa.
Underwater archaeology--Italy--Liguria.
Princeton subject headings:
Excavations (Archaeology)--Italy--Liguria.
Harbors--Italy--Liguria--History.
Liguria (Italy)--Antiquities.
Liguria (Italy)--Commerce--History.