000 00260nam a2200121Ia 4500
100 _aSharma, P. D.
250 _a7th rev ed
942 _cBK
245 _aEcology and environment
260 _aRastogi Publ, Meerut
_c1996
082 _a301.3 Sha
300 _a636
999 _c39790
_d39790