Columbia subject headings:
Working class--France--Belfort.
Working class--France--Montbéliard.
Harvard subject headings:
Labor movement--France--Belfort.
Labor movement--France--Montbéliard.
Labor--France--Belfort.
Labor--France--Montbéliard.
Working class--France--Belfort.
Working class--France--Montbéliard.
Princeton subject headings:
Labor movement--France--Belfort.
Labor movement--France--Montbéliard.
Working class--France--Belfort.
Working class--France--Montbéliard.