Columbia subject headings:
Demography--Mathematical models--Congresses.
Developing countries--Population policy--Congresses.
Economic development--Mathematical models--Congresses.
Population policy--Congresses.
Population--Mathematical models--Congresses.
Harvard subject headings:
Demography--Mathematical models--Congresses.
Developing countries--Population policy--Congresses.
Economic development--Mathematical models--Congresses
Population policy--Congresses.
Population--Mathematical models--Congresses.
Princeton subject headings: