Columbia subject headings:
Building trades--Italy--Turin--History.
Construction workers--Italy--Turin--History.
Working class--Italy--Turin--History.
Harvard subject headings:
Building trades--Italy--Turin--History.
Construction workers--Italy--Turin--History.
Labor and laboring classes--Italy--Turin--History.
Working class--Italy--Turin--History.
Princeton subject headings:
Construction workers--Italy--Piemonte--History.