Columbia subject headings:
Harvard subject headings:
Cities and towns--Germany (East)
Cities and towns--Germany (East)--History--Exhibitions.
Cities and towns--Germany (West)
Cities and towns--Germany (West)--History--Exhibitions.
Cities and towns--Germany--History--Exhibitions.
German states--History--Exhibitions.
Germany (East)--Relations--Germany (West)
Germany (East)--Relations--Germany (West)--Exhibitions.
Germany (West)--Relations--Germany (East)--Exhibitions.
Sister cities--History--Exhibitions.
Sister cities.
Princeton subject headings:
Cities and towns--Germany (East)
Cities and towns--Germany (West)
Germany (East)--Relations--Germany (West)
Germany (West)--Relations--Germany (East)
Sister cities.