Columbia subject headings:
Harvard subject headings:
Documentary films--Production and direction--Italy.
Matàna de Po (Motion picture)
Montaldi, Danilo--Correspondence.
Po River Region (Italy)--Social life and customs.
Transport workers--Italy--Po River Region.
Princeton subject headings:
Documentary films--Production and direction--Italy.
Matàna de Po (Motion picture)
Po River Region (Italy)--Social life and customs.
Transport workers--Italy--Po River Region.