Columbia subject headings:
Harvard subject headings:
Federazione italiana dei lavoratori del mare--History--Congresses.
Merchant mariners--Labor unions--Italy--History--20th century--Congresses.
Strikes and lockouts--Sailors--Italy--History--20th century--Congresses.
Princeton subject headings:
Federazione italiana dei lavoratori del mare--History--Congresses.
Merchant mariners--Labor unions--Italy--History--20th century--Congresses.
Strikes and lockouts--Sailors--Italy--History--20th century--Congresses.