000 00342nam a2200145Ia 4500
008 220926s9999 xx 000 0 und d
100 _aJ.P.Sharma
245 0 _aEnvironmental Studies
250 _a1st Ed
260 _aNew Delhi
260 _bLaxmi Publications Pvt. Ltd.
260 _c0
650 _aEnvironmental Studies
942 _cBK
999 _c20597
_d20597