000 00384nam a2200169Ia 4500
008 250224s9999 xx 000 0 und d
020 _a9788178129082
082 _a720
082 _bGup
100 _aGupta R
245 0 _aObjective Environmental Science
250 _a1st
260 _bRamesh Publishing House, New delhi.
260 _c2023
300 _a294
942 _cBK
999 _c198968
_d198968