Columbia subject headings:
Cities and towns--Growth--Mathematical models.
Ecology--Mathematical models.
Population--Mathematical models.
Urbanization--Mathematical models.
Harvard subject headings:
Cities and towns--Growth--Mathematical models
Ecology--Mathematical models
Population--Mathematical models
Urbanization--Mathematical models.
Princeton subject headings:
Cities and towns--Growth--Mathematical models.
Ecology--Mathematical models.
Population--Mathematical models.
Urbanization--Mathematical models.