000 00294nam a2200121Ia 4500
008 170101s2012 xx 000 0 und d
082 _a628 THA
100 _aThakur Vidya
245 2 _aA textbook of Environmental science
260 _bScientific
_c2012
300 _a307p
942 _2ddc
_cB
999 _c1661466
_d1661466