000 00278nam a2200121Ia 4500
008 220821s2011 xx 000 0 eng d
100 _aSRIVASTAVA, SMRITI
245 0 _aENVIRONMENT AND ECOLOGY
250 _a3RD
260 _bKATARIA
_c2011
300 _a322
942 _2ddc
_cBTECH
999 _c2201
_d2201