History 90 Land tenure 86 Architecture 58 Arquitectura 56 urban and land use planning 50 Planificación urbana y uso de las tierras 36 Land reform 32 more ... Tenencia de la tierra 32 Land use 31 Law and legislation 27 Politics and government 25 Historia 23 History and criticism 23 Social conditions 17 Education 15 Criticism and interpretation 14 Educación 14 Planificación urbana y de uso de las tierras 14 Indians of South America 13 Philosophy 13 Reforma agraria 13 Economic conditions 12 Urbanization 12 Agriculture 11 Filosofía 11 Social aspects 11 Mexican Americans 10 Government relations 9 Land use, Urban 9 Rural conditions 9 less ...