Columbia subject headings:
Harvard subject headings:
Iron industry and trade--France--Jura.
Iron smelting--France--Jura.
Jura (France)--Economic conditions.
Jura (France)--History.
Princeton subject headings:
Foundries--France--Jura.
Iron industry and trade--France--Jura.
Metallurgy--France--Jura.
Mines and mineral resources--France--Jura.