00279nam a2200109 a 450000500170000002000150001708200130003210000220004524500550006726000260012230000210014820251203110840.0  a8189913484  a025bSIN  aSingh, C. Praveen  aDocumentation and information science in libraries  aNew DelhibAlfac2008  a257p.c22 cm. HB