Columbia subject headings:
Harvard subject headings:
Berlin (Germany)--Buildings, structures, etc.--Pictorial works
Berlin Wall, Berlin, Germany, 1961-1989--Pictorial works
Germany--History--Unification, 1990.
Graffito decoration--Germany--Berlin.
Mauer, Armin--Pictorial works.
Schenk, Andreas.
Princeton subject headings:
Berlin (Germany)--Buildings, structures, etc.--Pictorial works.
Berlin Wall, Berlin, Germany, 1961-1989--Pictorial works.
Graffito decoration--Berlin--Germany.