Columbia subject headings:
Harvard subject headings:
Industrial relations--Congresses
Industrial relations--Italy--Congresses
Labor unions--Congresses
Labor unions--Italy--Congresses
Strikes and lockouts--Congresses.
Strikes and lockouts--Italy--Congresses.
Princeton subject headings:
Industrial relations--Congresses.
Industrial relations--Italy--Congresses.
Labor unions--Congresses.
Labor unions--Italy--Congresses.
Strikes and lockouts--Congresses.
Strikes and lockouts--Italy--Congresses.