History 131 Land tenure 86 Motion picture plays, Spanish 67 Architecture 58 Arquitectura 55 urban and land use planning 50 History and criticism 44 more ... Agriculture 42 Historia 41 Politics and government 40 Agricultura 39 Agronomía 37 Planificación urbana y uso de las tierras 36 Agronomy 35 Land reform 32 Tenencia de la tierra 32 Animal science 31 Criticism and interpretation 31 Land use 31 Law and legislation 30 Agronomia 28 Motion picture plays 25 Social conditions 24 Man-woman relationships 23 Technology 21 Tecnología 21 Economic conditions 18 General 18 Spanish literature 18 Cattle 16 less ...