000 00304nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a628.5
100 _aSurinder Deswal
245 0 _aEnvironmental Studies
250 _a2
260 _bDhanpat Rai Publications Pvt Ltd, New Delhi
_c2013
942 _cBK
999 _c35140
_d35140