Agricultura 1 Bibliotecolog{acute}ia 1 Ciencias de la informaci{acute}on 1 Condiciones econ{acute}omicas 1 Desarrollo sostenible 1 Economic conditions 1 Indians of Mexico 1 hơn ... Indios de M{acute}exico 1 Information science 1 Library science 1 Social conditions 1 Sustainable development 1 Traditional farming 1 ít hơn ...