History 215 Land tenure 86 History and criticism 76 Motion picture plays, Spanish 67 Historia 62 Architecture 61 Arquitectura 59 more ... urban and land use planning 50 General 49 Educación 48 Education 47 Philosophy 47 Agriculture 42 Criticism and interpretation 42 Politics and government 42 Agronomía 38 Agricultura 37 Filosofía 37 Law and legislation 37 Agronomy 36 Planificación urbana y uso de las tierras 36 Science 35 Land reform 32 Tenencia de la tierra 32 Land use 31 Animal science 30 Social conditions 30 Agronomia 28 Tecnología 27 Social aspects 26 less ...