History 148 Land tenure 86 Motion picture plays, Spanish 67 History and criticism 61 Architecture 58 Arquitectura 57 urban and land use planning 50 more ... Historia 47 Educación 42 General 40 Education 38 Philosophy 37 Planificación urbana y uso de las tierras 36 Criticism and interpretation 33 Filosofía 33 Land reform 32 Tenencia de la tierra 32 Land use 31 Law and legislation 31 Social conditions 28 Motion picture plays 25 Politics and government 25 Man-woman relationships 22 Medicina 22 Science 21 Women 20 Economic conditions 19 Ciencias sociales 18 Indians of South America 17 Research 17 less ...