Columbia subject headings:
Harvard subject headings:
German reunification question (1949-1990)--Congresses
Germany--History--Unification, 1990--Congresses.
Nationalism--Germany--Congresses.
Princeton subject headings:
Collective memory--Germany--Congresses.
Germany--History--Unification, 1990--Congresses.
Germany--Social conditions--1990---Congresses.