Columbia subject headings:
Economic indicators--Developing countries.
Poor--Developing countries.
Social indicators--Developing countries.
Harvard subject headings:
Developing countries--Economic indicators.
Developing countries--Poor.
Developing countries--Social indicators.
Economic indicators--Developing countries.
Poor--Developing countries
Social indicators--Developing countries.
Princeton subject headings:
Economic indicators--Developing countries.
Poor--Developing countries.
Social indicators--Developing countries.