Columbia subject headings:
Berlin (Germany)--Buildings, structures, etc.
Berlin (Germany)--History--1945-1990--Pictorial works.
Berlin (Germany)--History--1990---Pictorial works.
Berlin Wall, Berlin, Germany, 1961-1989--Pictorial works.
Walls--Germany--Berlin--Pictorial works.
Harvard subject headings:
Berlin (Germany)--Buildings, structures, etc.--Pictorial works
Berlin (Germany)--History--1945-1990--Pictorial works.
Berlin Wall, Berlin, Germany, 1961-1989--Pictorial works
Princeton subject headings: