Columbia subject headings:
Community development--Mexico--Valles (Region)
Rural development--Mexico--Valles (Region)
Valles (Mexico : Region)--Economic conditions.
Valles (Mexico : Region)--Social conditions.
Harvard subject headings:
Community development--Mexico--Valles (Region)
Rural development--Mexico--Valles (Region)
Valles (Mexico : Region)--Economic conditions.
Valles (Mexico : Region)--Social conditions.
Princeton subject headings:
Community development--Mexico--Valles (Region).
Economic development--Mexico--Valles (Region).
Regional planning--Mexico--Valles (Region).