000 00269nam a22001217a 4500
999 _c4033
_d4033
020 _a9789352605705
082 _a600 AGR
100 _aAgrahari P Ravi
245 _aScience and Technology
260 _aNew Delhi
_bMcGraw Hill
_c2017
650 _aTechnology
942 _cBK