000 00269nam a22001097a 4500
082 _a680.
100 _aNAVEEN SINGHAL
245 _aENVIRONMENTAL SCIENCE & SUSTAINABILITY SEM -I
250 _aFIRST ED
260 _aN.DELHI
_bPRAGATI PRAKASHAN
_c2025
942 _2ddc
_cBK
999 _c14518
_d14518