00281nam a2200109 a 450000500170000002000150001708200130003210000170004524500440006226000450010630000200015120251203110053.0  a8171695272  a020bKOC  aKochar, R.S.  aNature and functions of library science  aNew DelhibCommonwealth Publishersc1998  av,305p.c23 cm.