Land tenure 86 History 80 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 American literature 20 Criticism and interpretation 19 Historia 19 History and criticism 18 Social conditions 16 Literatura 14 Literature 14 Planificación urbana y de uso de las tierras 14 Reforma agraria 13 Formas y géneros literarios 12 Indians of South America 12 Urbanization 12 Economic conditions 11 Mexican Americans 11 Law 10 Philosophy 10 Government relations 9 Land use, Urban 9 Rural conditions 9 less ...