History 140 Land tenure 86 Motion picture plays, Spanish 67 Architecture 57 Arquitectura 56 History and criticism 51 urban and land use planning 50 more ... General 42 Historia 40 Planificación urbana y uso de las tierras 36 Land reform 32 Tenencia de la tierra 32 Land use 31 Medicina 31 Philosophy 31 Educación 30 Law and legislation 27 Social conditions 27 Politics and government 26 Criticism and interpretation 25 Education 25 Filosofía 25 Motion picture plays 25 Man-woman relationships 22 Women 20 Medical 19 Economic conditions 18 Ciencias sociales 17 Indians of South America 16 Research 16 less ...