000 00303nam a2200121Ia 4500
005 20240713150307.0
008 240712s9999 xx 000 0 und d
041 _aeng
100 _aAsthana, D.N.
245 _aA.T.B.of environmental studies
260 _aNew Delhi
_b S.chand & co.
_c2019
300 _a397
999 _c28288
_d28288