Land tenure 86 History 76 Architecture 57 Arquitectura 55 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 23 Politics and government 22 Historia 19 History and criticism 18 American literature 17 Criticism and interpretation 17 Social conditions 16 Planificación urbana y de uso de las tierras 14 Reforma agraria 13 Indians of South America 12 Urbanization 12 Economic conditions 11 Literatura 11 Literature 11 Mexican Americans 11 Law 10 Philosophy 10 Formas y géneros literarios 9 Government relations 9 Land use, Urban 9 Rural conditions 9 less ...