Land tenure 86 History 74 Architecture 59 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 30 Education 29 Educación 24 Politics and government 21 Curricula 17 Social conditions 16 Urbanization 16 Historia 15 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 10 Planes de estudio 10 Public administration 10 Government relations 9 History and criticism 9 Land use, Urban 9 Rural conditions 9 Social aspects 9 less ...