Columbia subject headings:
Harvard subject headings:
Berlin Wall, Berlin, Germany, 1961-1989--Congresses.
Collective memory--Germany.
Germany--History--1945-1990--Congresses.
Germany--History--Unification, 1990--Congresses.
Germany--Politics and government--1990---Congresses.
Politics and culture--Germany--History--20th century--Congresses.
Princeton subject headings:
Berlin Wall, Berlin, Germany, 1961-1989--Congresses.
Collective memory--Germany.
Germany--History--1945-1990--Congresses.
Germany--History--Unification, 1990--Congresses.
Germany--Politics and government--1990---Congresses.
Politics and culture--Germany--History--20th century--Congresses.