Columbia subject headings:
East-West trade--Congresses.
International economic relations--Congresses.
Harvard subject headings:
East-West trade--Congresses.
International economic relations--Congresses
Princeton subject headings:
Europe, Central--Economic conditions--Congresses.
Europe, Eastern--Economic conditions--1989---Congresses.
Europe--Economic conditions--1945---Congresses.
International economic relations--Congresses.