Columbia subject headings:
Human beings--Migrations.
Human geography.
Population geography.
Harvard subject headings:
Australia--Emigration and immigration--Mathematical models.
Australia--Population--Mathematical models.
Emigration and immigration--Mathematical models.
Population--Mathematical models
Princeton subject headings:
Australia--Emigration and immigration--Mathematical models.
Australia--Population--Mathematical models.
Emigration and immigration--Mathematical models.
Population--Mathematical models.