000 00270nam a2200109Ia 4500
008 221130s2008 xx 000 0 und d
041 _aeng
082 _a574.5
100 _aSareen, S.
_91223206
245 _aEnvironmental studies
260 _aN.Delhi
_bSarup & Sons
_c2008
999 _c793521
_d793521