Columbia subject headings:
Harvard subject headings:
Iron and steel workers--Italy--Terni--History.
Terni (Italy)--Social conditions.
Thyssen Krupp AG
Working class--Italy--Terni--History.
Princeton subject headings:
Iron and steel workers--Italy--Terni--History.
Terni (Italy)--Social conditions.
Thyssen Krupp AG--History.
Working class--Italy--Terni--History.