Columbia subject headings:
Berlin (Germany)--History--1990-
Capitals (Cities)--Congresses.
Germany--Capital and capitol--Law and legislation--Congresses.
Harvard subject headings:
Berlin (Germany)--History--1990---Congresses.
Capitals (Cities)--Congresses.
Germany--Capital and capitol--Law and legislation--Congresses.
Princeton subject headings:
Berlin (Germany)--History--1990---Congresses.
Capitals (Cities)--Congresses.
Germany--Capital and capitol--Law and legislation--Congresses.