Columbia subject headings:
Central planning--Communist countries--Congresses.
Communist countries--Commerce--Congresses.
International trade--Congresses.
Harvard subject headings:
Central planning--Communist countries--Congresses.
Communist countries--Commerce--Congresses.
International trade--Congresses
Princeton subject headings:
Central planning--Communist countries--Congresses.
Communist countries--Commerce--Congresses.
International trade--Congresses.