Columbia subject headings:
Economic assistance, Communist--Developing countries--Statistics.
Warsaw Treaty Organization.
Harvard subject headings:
Economic assistance, Communist--Developing countries--Statistics.
Warsaw Treaty Organization.
Princeton subject headings:
Economic assistance, Communist--Developing countries--Statistics.
Economic assistance, Cuban--Developing countries--Statistics.
Economic assistance, East European--Developing countries--Statistics.
Economic assistance, Soviet--Developing countries--Statistics.
Statistics.
Warsaw Treaty Organization.