Columbia subject headings:
Harvard subject headings:
Cantiere navale di Livorno--History--20th century.
Shipbuilding industry--Italy--Livorno--Employees--History--20th century.
Shipbuilding--Employees--Labor unions--Italy--Livorno--History--20th century.
Princeton subject headings:
Cantiere navale di Livorno--History--20th century.
Shipbuilding industry--Employees--Italy--Livorno--History--20th century.
Shipbuilding industry--Employees--Labor unions--Italy--Livorno--History--20th century.