Columbia subject headings:
Harvard subject headings:
Berlin Wall, Berlin, Germany, 1961-1989
Cold War--Social aspects--Germany.
Germany (East)--Boundaries--Germany (West)
Germany (East)--Relations--Germany (West)
Germany (West)--Boundaries--Germany (East)
Germany (West)--Relations--Germany (East)
Princeton subject headings:
Berlin Wall, Berlin, Germany, 1961-1989.
Cold War--Social aspects--Germany.
Germany (East)--Boundaries--Germany (West)
Germany (East)--Relations--Germany (West)
Germany (West)--Boundaries--Germany (East)
Germany (West)--Relations--Germany (East)