000			00343nam a22001457a 4500
020			_a8171331106
082			_a574.5 _bSHA/E
100			_aSharma, P D
245			_aEcology and environment / _cby P D Sharma
250			_a6th ed.
260			_aMeerut : _bRastogi publications, _c1991
300			_a519p. :
650			_aEcology
942			_cBK
999			_c306246 _d306246