History 175 Land tenure 86 Motion picture plays, Spanish 67 History and criticism 60 Architecture 59 Arquitectura 58 Historia 55 more ... General 51 urban and land use planning 50 Philosophy 39 Educación 38 Criticism and interpretation 37 Law and legislation 37 Planificación urbana y uso de las tierras 36 Education 33 Social conditions 33 Land reform 32 Politics and government 32 Tenencia de la tierra 32 Land use 31 Filosofía 29 Medicina 27 Ciencias sociales 25 Motion picture plays 25 Public administration 24 Economic conditions 23 Administración pública 22 Man-woman relationships 22 Women 20 American literature 18 less ...