Columbia subject headings:
Industrial archaeology--Italy--Maremma.
Industries--Italy--Maremma--History.
Metallurgy--Italy--Maremma--History.
Mines and mineral resources--Italy--Maremma--History.
Harvard subject headings:
Industrial archaeology--Italy--Maremma.
Maremma (Italy)--History.
Metallurgy--Italy--Maremma--History.
Mines and mineral resources--Italy--Maremma--History.
Princeton subject headings:
Industrial archaeology--Italy--Maremma.
Iron and steel workers--Italy--Maremma.
Iron industry and trade--Italy--Maremma.
Labor movement--Italy--Maremma.
Maremma (Italy)--Economic conditions.
Mines and mineral resources--Italy--Maremma.