Columbia subject headings:
Harvard subject headings:
Communism--Developing countries--Congresses.
Communist strategy--Congresses.
Developing countries--Foreign relations--Soviet Union--Congresses.
Revolutions and socialism--Developing countries--Congresses.
Soviet Union--Foreign relations--Developing countries--Congresses.
Princeton subject headings:
Developing countries--Relations--Soviet Union--Congresses.
Revolutions and socialism--Congresses.
Revolutions--Developing countries--Congresses.
Soviet Union--Relations--Developing countries--Congresses.