Columbia subject headings:
Consumer cooperatives--Germany--Berlin.
Consumer cooperatives--Germany.
Labor movement--Germany.
Harvard subject headings:
Consumer cooperatives--Germany--Berlin.
Consumer cooperatives--Germany.
Labor movement--Germany.
Princeton subject headings:
Berlin (Germany)--Social conditions.
Consumer cooperatives--Germany--Berlin--History.
Cooperative societies--Germany--Berlin--History.
Labor movement--Germany--Berlin--History.