History 90 Land tenure 86 Architecture 62 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 24 Politics and government 23 Social conditions 18 Historia 16 History and criticism 14 Planificación urbana y de uso de las tierras 14 Criticism and interpretation 13 Reforma agraria 13 Urbanization 13 Economic conditions 12 Indians of South America 12 Mexican Americans 10 Rural conditions 10 Social aspects 10 City planning 9 Government relations 9 Land use, Urban 9 Agriculture 8 Environmental aspects 8 Intellectual life 8 Land settlement 8 less ...