History 106 Land tenure 86 Motion picture plays, Spanish 67 Architecture 57 Arquitectura 55 urban and land use planning 50 History and criticism 40 more ... Agriculture 36 Agronomía 36 Planificación urbana y uso de las tierras 36 Agronomy 34 Criticism and interpretation 34 Land reform 32 Tenencia de la tierra 32 Land use 31 Agricultura 30 Animal science 30 Agronomia 27 Law and legislation 27 Motion picture plays 25 Politics and government 24 Man-woman relationships 23 Historia 21 Spanish drama 19 Spanish literature 19 Cattle 16 Ganado 16 Science 16 Social conditions 16 Tecnología 15 less ...