000 00250nam a22001217a 4500
003 SGT
082 _a660
_bSIN
100 _aSINGH, RITU
245 _aENGINEERING CHEMISTRY
260 _aDELHI
_bNAROSA PUB.
_c2020
300 _a380
942 _2ddc
_cBK
999 _c24650
_d24650