Columbia subject headings:
Harvard subject headings:
Developing countries--Foreign economic relations--Europe, Eastern.
Developing countries--Foreign economic relations--Soviet Union.
Europe, Eastern--Foreign economic relations--Developing countries.
Soviet Union--Foreign economic relations--Developing countries.
Princeton subject headings:
Developing countries--Foreign economic relations--Europe, Eastern.
Developing countries--Foreign economic relations--Soviet Union.
Europe, Eastern--Foreign economic relations--Developing countries.
Soviet Union--Foreign economic relations--Developing countries.