Columbia subject headings:
Guanajuato (Mexico)--Emigration and immigration.
Nahuas--Mexico--San Agustín Oapan--Economic conditions.
Nahuas--Mexico--San Agustín Oapan--Migrations.
Nahuas--Mexico--San Agustín Oapan--Social conditions.
San Agustín Oapan (Mexico)--Emigration and immigration.
San Miguel de Allende (Mexico)--Emigration and immigration.
Tourism--Social aspects--Mexico--Guanajuato.
Tourism--Social aspects--Mexico--San Agustín Oapan.
Tourism--Social aspects--Mexico--San Miguel de Allende.
Harvard subject headings:
Nahuas--Commerce--Mexico--Balsas River Valley.
Nahuas--Mexico--Balsas River Valley--Social conditions.
Nahuas--Migration--Mexico--Balsas River Valley.
Tourism--Mexico--Balsas River Valley.
Princeton subject headings:
Nahuas--Commerce--Mexico--Balsas River Valley.
Nahuas--Mexico--Balsas River Valley--Social conditions.
Nahuas--Migration--Mexico--Balsas River Valley.
Tourism--Mexico--Balsas River Valley.