Columbia subject headings:
Harvard subject headings:
Bolognano (Italy)--Economic conditions--20th century.
Bussi sul Tirino (Italy)--Economic conditions--20th century.
Chemical industry--Italy--Bolognano--History.
Chemical industry--Italy--Bussi sul Tirino--History.
Industrialization--Italy--Bolognano--History.
Industrialization--Italy--Bussi sul Tirino--History.
Princeton subject headings:
Bolognano (Italy)--Economic conditions--20th century.
Bussi sul Tirino (Italy)--Economic conditions--20th century.
Chemical industry--Italy--Bolognano--History.
Chemical industry--Italy--Bussi sul Tirino--History.
Industrialization--Italy--Bolognano--History.
Industrialization--Italy--Bussi sul Tirino--History.