Columbia subject headings:
Harvard subject headings:
Labor movement--Germany--Saarland--History.
Miners--Labor unions--Germany--Saarland--History.
Strikes and lockouts--Miners--Germany--Saarland--History.
Princeton subject headings:
Labor movement--Germany--Saarland--History.
Miners--Labor unions--Germany--Saarland--History.
Strikes and lockouts--Miners--Germany--Saarland--History.