000 00255nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aSharma, P.D
245 0 _aEcology And Environment
260 _aMeerut
_bRastogi
_c2010
300 _a600p.
942 _cBK
999 _c11997
_d11997