Land tenure 86 History 77 Architecture 59 Arquitectura 56 urban and land use planning 50 Planificación urbana y uso de las tierras 36 Education 33 more ... Land reform 32 Tenencia de la tierra 32 Land use 31 Law and legislation 30 Educación 26 Politics and government 22 Historia 18 Curricula 17 Social conditions 17 Urbanization 16 History and criticism 14 Planificación urbana y de uso de las tierras 14 Reforma agraria 13 City planning 12 Economic conditions 12 Indians of South America 12 Mexican Americans 11 Philosophy 11 Public administration 11 Criticism and interpretation 10 Planes de estudio 10 Agriculture 9 General 9 less ...