History 169 Land tenure 86 Motion picture plays, Spanish 67 Architecture 57 History and criticism 57 Arquitectura 56 urban and land use planning 50 more ... Historia 49 General 40 Planificación urbana y uso de las tierras 36 Politics and government 33 Social conditions 33 Land reform 32 Tenencia de la tierra 32 Land use 31 Philosophy 31 Educación 29 Criticism and interpretation 28 Law and legislation 27 Filosofía 26 Education 25 Motion picture plays 25 Economic conditions 24 Man-woman relationships 23 Medicina 21 Ciencias sociales 20 Spanish language 20 Women 19 Indians of South America 16 Research 16 less ...