000 00262nam a2200121 4500
020 _a9788120336513
082 _a658.05
_bKEL/I
100 _aKelkar, S A
245 _ainformation systems
260 _aDelhi
_bPHI Learning
_cDelhi
300 _a935p
942 _cBK
999 _c45362
_d45362