Columbia subject headings:
Harbors--Italy--Genoa (Province)--History--Congresses.
Harbors--Italy--Genoa--History--Congresses.
Harbors--Italy--Liguria--History--Congresses.
Harvard subject headings:
Harbors--Italy--Genoa (Province)--History--Congresses.
Harbors--Italy--Genoa--Colonies--History--Congresses.
Princeton subject headings:
Genoa (Italy)--History.
Harbors--Italy--Genoa--History.
Port districts--Italy--Genoa--History.