Columbia subject headings:
Berlin Wall, Berlin, Germany, 1961-1989.
Germany--Politics and government--1945-1990.
Harvard subject headings:
Berlin (Germany)--History--1945-1990--Miscellanea.
Berlin Wall, Berlin, Germany, 1961-1989--Miscellanea.
German reunification question (1949-1990)--Miscellanea.
Princeton subject headings:
Berlin (Germany)--History--1945-1990--Miscellanea.
Berlin (Germany)--Politics and government--1945-1990--Miscellanea.
Berlin Wall, Berlin, Germany, 1961-1989--Miscellanea.
German reunification question (1949-1990)--Miscellanea.