ISO/TR 20983 : information and documentation : performance indicators for electronic library services : information et documentation : indicateurs de performance pour les services életroniques des bibliothèques =ISO/TR 20983
International Organization for Standardization Inglês 1st ed., Genève: ISO, 2003 V, [1], 32 p. ; 30 cm Colecção : Technical report CDU: 001.811:003.083