History 179 Land tenure 86 History and criticism 81 Motion picture plays, Spanish 67 Architecture 63 Arquitectura 60 General 51 more ... urban and land use planning 50 Philosophy 49 Historia 47 Criticism and interpretation 40 Politics and government 40 Agriculture 39 Education 39 Agronomía 38 Educación 37 Social conditions 37 Agronomy 36 Planificación urbana y uso de las tierras 36 Agricultura 34 Land reform 32 Science 32 Tenencia de la tierra 32 Land use 31 Animal science 30 Filosofía 30 Law and legislation 29 Agronomia 28 Research 28 Spanish literature 26 less ...