000 00293nam a2200109Ia 4500
008 220509s2012 xx 000 0 und d
041 _aeng
082 _a333.7
_bDAW/TEX
100 _aDawan, Ashok
_9771444
245 _aA textbook of environmental studies
260 _aNew Delhi
_bSaurabh
_c2012
999 _c522551
_d522551