Columbia subject headings:
Braunschweig (Germany)--Social conditions.
Labor unions--Germany--Braunschweig--History--20th century.
Working class--Germany--Braunschweig--History--20th century.
Harvard subject headings:
Braunschweig (Germany)--Social conditions.
Labor unions--Germany--Braunschweig--History--20th century.
Working class--Germany--Braunschweig--History--20th century.
Princeton subject headings:
Braunschweig (Germany)--Social conditions.
Labor unions--Germany (West)--Braunschweig--History--20th century.
Working class--Germany (West)--Braunschweig--History--20th century.