Columbia subject headings:
Berlin (Germany)--History.
Berlin (Germany)--Social conditions.
Industries--Germany--Berlin--History--19th century.
Harvard subject headings:
Berlin (Germany)--History
Berlin (Germany)--Social conditions
City planning--Germany--Berlin
Industries--Germany--Berlin--History--19th century.
Princeton subject headings:
Berlin (Germany)--History.
Berlin (Germany)--Social conditions.
Industries--Germany--Berlin--History.