Columbia subject headings:
Harvard subject headings:
Forge shops--France--Périgord--History.
Forging industry--France--Périgord--History.
Iron industry and trade--France--Perigord--History.
Princeton subject headings:
Forge shops--France--Périgord--History.
Forging industry--France--Périgord--History.
Iron industry and trade--France--Périgord--History.