Columbia subject headings:
Harvard subject headings:
Labor movement--Italy--Piedmont--History.
Metallurgica Vittorio Cobianchi (Firm).
Omegna (Italy)--Social conditions.
Steel industry and trade--Italy--Omegna.
Princeton subject headings:
Iron and steel workers--Italy--Omegna.
Omegna (Italy)--Economic conditions.
Steel industry and trade--Italy--Omegna.