Columbia subject headings:
Harvard subject headings:
East-West trade.
Europe--Foreign economic relations--Soviet Union.
Soviet Union--Foreign economic relations--Europe.
Soviet Union--Foreign economic relations--United States.
United States--Foreign economic relations--Soviet Union.
Princeton subject headings:
East-West trade.
Europe--Foreign economic relations--Soviet Union.
Soviet Union--Foreign economic relations--Europe.
Soviet Union--Foreign economic relations--United States.
United States--Foreign economic relations--Soviet Union.