Columbia subject headings:
Harvard subject headings:
Berlin (Germany)--Description and travel
Berlin (Germany)--History--1945-1990
Berlin Wall, Berlin, Germany, 1961-1989--History--Pictorial works.
Berlin Wall, Berlin, Germany, 1961-1989--History.
Gedenkstätte Berliner Mauer (Berlin, Germany)
Princeton subject headings:
Berlin (Germany)--Description and travel.
Berlin (Germany)--History--1945-1990.
Berlin Wall, Berlin, Germany, 1961-1989--History.