Columbia subject headings:
Valle de Santiago (Mexico)--Economic conditions.
Valle de Santiago (Mexico)--Rural conditions.
Harvard subject headings:
Agriculture--Economic aspects--Mexico--Bajío Region.
Agriculture--Economic aspects--Mexico--El Bajío.
Bajío Region (Mexico)--Economic conditions.
Capitalists and financiers--Mexico--Bajío Region.
Capitalists and financiers--Mexico--El Bajío.
El Bajío (Guanajuato, Mexico)--Economic conditions.
Middle class--Mexico--Bajío Region.
Middle class--Mexico--El Bajío.
Princeton subject headings:
Agriculture--Economic aspects--Mexico--Bajío Region.
Bajío Region (Mexico)--Economic conditions.
Capitalists and financiers--Mexico--Bajío Region.
Middle class--Mexico--Bajío Region.