Columbia subject headings:
Harvard subject headings:
Cogne (Italy)--Economic conditions--20th century.
Steel industry and trade--Italy--Cogne--History--20th century.
Steel industry and trade--Italy--Cogne--Statistics.
Princeton subject headings:
Cogne (Italy)--Economic conditions--20th century.
Steel industry and trade--Italy--Cogne--History--20th century.
Steel industry and trade--Italy--Cogne--Statistics.