Columbia subject headings:
Harvard subject headings:
Berlin (Germany)--Economic conditions--Congresses.
Central business districts--Germany--Berlin--History--Congresses.
Cities and towns--Germany--Berlin--Growth--History--Congresses.
City planning--Germany--Berlin--History--Congresses.
Housing--Germany--Berlin--History--Congresses.
Princeton subject headings:
Berlin (Germany)--History--Congresses.
Cities and towns--Growth--Congresses.
City planning--Germany--Berlin--History--Congresses.
Urban cores--Germany--Berlin--Congresses.