Columbia subject headings:
Europe, Central--Ethnic relations--Congresses.
Europe, Central--Foreign economic relations--Congresses.
Europe, Central--Politics and government--1989---Congresses.
Europe, Eastern--Ethnic relations--Congresses.
Europe, Eastern--Foreign economic relations--Congresses.
Europe, Eastern--Politics and government--1989---Congresses.
North Atlantic Treaty Organization--Membership--Congresses.
Harvard subject headings:
Europe, Central--Economic conditions--Congresses.
Europe, Central--Foreign relations--Congresses.
Europe, Central--History--1989---Congresses.
Europe, Eastern--Economic conditions--1989---Congresses.
Europe, Eastern--Foreign relations--1989---Congresses.
Europe, Eastern--History--1989---Congresses.
North Atlantic Treaty Organization--Congresses.
Princeton subject headings: