Columbia subject headings:
Harvard subject headings:
Berlin (Germany)--History--1945-1990--Exhibitions.
Germany (East)--Social conditions--Exhibitions.
Germany (East)--Social life and customs--Exhibitions.
Germany--History--Unification, 1990--Exhibitions.
Labor--Germany--Exhibitions.
Princeton subject headings:
Germany--Civilization--Exhibitions.
Germany--History--Unification, 1990--Exhibitions.
Germany--Social conditions--1990---Exhibitions.
Labor--Germany--Exhibitions.