000 00280nam a2200109 4500
020 _a8171694845
082 _a029.7 DHA/PRI
100 _aDhawan, K S
245 _aPrinciples of information retrieval
_cby Dhawan, K S
260 _aNew Delhi
_bCommonwealth pub.
_c1997
942 _cBK
999 _c381059
_d381059