Columbia subject headings:
Harvard subject headings:
Basic needs--Developing countries--Mathematical models--Congresses.
Developing countries--Economic policy--Mathematical models--Congresses.
Developing countries--Social policy--Mathematical models--Congresses.
Economic development--Mathematical models--Congresses
Princeton subject headings:
Developing countries--Economic policy--Mathematical models--Congresses.
Developing countries--Social policy--Mathematical models--Congresses.
Economic development--Mathematical models--Congresses.