1 resultados para 'reference services'
Reference services (en)
Servicio de referencia (es), Service de référence (fr), Справочные услуги (ru), خدمات مرجعية (ar)
Information systems
Clearing houses, Information retrieval, Information services, Information/library cooperation, Libraries, Reference materials
Information and communication
> Documentary information systems
Servicio de referencia (es), Service de référence (fr), Справочные услуги (ru), خدمات مرجعية (ar)
http://vocabularies.unesco.org/thesaurus/concept5420