00483nam a22001577a 4500003000400000020001500004082001800019245008900037260008600126300000900212440000600221546001200227650003600239650003200275700001800307OSt  a8172635532  a025.5bSEN/IN  aInformation sources systems and programmes:binformation experts as resource persons  aNew DelhibIndira Gandhi National Open University School of Social Sciencesc1994  a72p.  v4  aEnglish  aLibrary and information science  aInformation sources systems  aSen, B K, ed.