Columbia subject headings:
Agricultural laborers--Italy--Cremona (Province)--History--Congresses.
Camera confederale del lavoro (Cremona, Italy)--History--Congresses.
Harvard subject headings:
Agricultural laborers--Italy--Cremona (Province)--History--Congresses.
Camera confederale del lavoro (Cremona, Italy)--History--Congresses.
Princeton subject headings:
Agricultural laborers--Italy--Cremona (Province)--History--Congresses.
Camera confederale del lavoro (Cremona, Italy)--History--Congresses.