Columbia subject headings:
Harvard subject headings:
Italy. Marina--History.
Liguria (Italy)--History, Naval.
Navigation--Italy--Liguria--History.
Steamboats--Italy--Liguria--History.
Princeton subject headings:
Italy. Marina--History.
Liguria (Italy)--History, Naval.
Navigation--Italy--Liguria--History.
Steamboats--Italy--Liguria--History.