Columbia subject headings:
Industries--Italy--Turin--History--20th century--Sources.
Italy--Social conditions--1918-1945--Sources.
Labor unions--Italy--Turin--History--20th century--Sources.
Lega industriale di Torino--History--Sources.
Turin (Italy)--Social conditions--20th century--Sources.
Harvard subject headings:
Industries--Italy--Turin--History--20th century.
Labor unions--Italy--Turin--History--20th century.
Princeton subject headings: