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