Columbia subject headings:
Harvard subject headings:
Europe, Central--Economic integration--Congresses.
Europe, Eastern--Economic integration--Congresses.
Free trade--Europe, Central--Congresses.
Free trade--Europe, Eastern--Congresses.
Regionalism--Europe, Central--Congresses.
Regionalism--Europe, Eastern--Congresses.
Princeton subject headings:
Europe, Central--Economic integration--Congresses.
Europe, Eastern--Economic integration--Congresses.
Free trade--Europe, Central--Congresses.
Free trade--Europe, Eastern--Congresses.
Regionalism--Europe, Central--Congresses.
Regionalism--Europe, Eastern--Congresses.