Columbia subject headings:
Harvard subject headings:
Mexico--Population policy
Migration, Internal--Mexico--Sonora (State)
Regional planning districts--Mexico--Sonora (State)
Sonora (Mexico : State)--Economic conditions.
Sonora (Mexico : State)--Population density.
Sonora (Mexico : State)--Population--Statistics.
Sonora (Mexico : State)--Social conditions.
Princeton subject headings:
Mexico--Population policy.
Migration, Internal--Mexico--Sonora (State).
Population density--Mexico--Sonora (State).
Regional planning districts--Mexico--Sonora (State).
Sonora (Mexico : State)--Economic conditions.
Sonora (Mexico : State)--Population--Statistics.
Sonora (Mexico : State)--Social conditions.