Columbia subject headings:
Labor movement--Germany--Oldenburg (Landkreis)
Oldenburg (Germany : Landkreis)--History.
Harvard subject headings:
Labor movement--Germany--Oldenburg (Landkreis)
Oldenburg (Germany : Landkreis)--History.
Princeton subject headings:
Labor movement--Germany (West)--Oldenburg (Landkreis)--Political activity.
Oldenburg (Germany : Landkreis)--History.