Columbia subject headings:
Harvard subject headings:
Iron and steel workers--France--Périgord--History--19th century.
Iron industry and trade--France--Périgord--History--19th century.
Princeton subject headings:
Forging industry--France--Périgord--History.
Iron and steel workers--France--Périgord--History.
Iron industry and trade--France--Périgord--History.
Labor--France--Périgord--History.