000 00299nam a2200109Ia 4500
008 210324s2012 xx 000 0 und d
041 _aeng
082 _a574.5
100 _aAstnana, D.K.
_91601541
245 _aTextbook of Environmental Studies
260 _aNew Delhi
_bS.Chand & Co. Pvt.Ltd.
_c2012
999 _c1050206
_d1050206