History 142 Land tenure 86 Motion picture plays, Spanish 67 Architecture 57 Arquitectura 56 History and criticism 55 urban and land use planning 50 more ... General 44 Historia 41 Agriculture 39 Agronomía 38 Agronomy 36 Planificación urbana y uso de las tierras 36 Agricultura 34 Land reform 32 Tenencia de la tierra 32 Educación 31 Land use 31 Animal science 30 Philosophy 30 Criticism and interpretation 29 Law and legislation 29 Agronomia 28 Science 28 Politics and government 27 Social conditions 27 Education 26 Filosofía 26 Motion picture plays 25 Man-woman relationships 23 less ...