Columbia subject headings:
Cities and towns--Germany (West)--Congresses.
City children--Congresses.
Youth--Germany (West)--Congresses.
Harvard subject headings:
Cities and towns--Germany--Congresses.
City children--Congresses.
Youth--Germany--Congresses.
Princeton subject headings:
Cities and towns--Germany (West)--Congresses.
City children--Congresses.
Youth--Germany (West)--Congresses.