Land tenure 86 History 81 Architecture 59 Arquitectura 57 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 Historia 23 History and criticism 21 Politics and government 17 Social conditions 16 Education 15 Educación 14 Planificación urbana y de uso de las tierras 14 Indians of South America 13 Reforma agraria 13 Economic conditions 12 Urbanization 12 Criticism and interpretation 11 Philosophy 11 Agriculture 9 Government relations 9 Land use, Urban 9 Rural conditions 9 Science 9 City planning 8 Filosofía 8 less ...