Columbia subject headings:
Architecture--Europe.
Architecture--Germany--Berlin.
City planning--Europe.
City planning--Germany--Berlin.
Harvard subject headings:
Architecture--Europe--Congresses.
Architecture--Germany--Berlin--Congresses.
City planning--Europe--Congresses
City planning--Germany--Berlin--Congresses.
Princeton subject headings:
Architecture--Europe.
Architecture--Germany--Berlin.
City planning--Europe.
City planning--Germany--Berlin.