000			00340nam a2200145Ia 4500
008			220926s9999 xx 000 0 und d
100			_aP.D.Sharma
245		0	_aEcology and Environment
250			_a2nd RP
260			_aNew Delhi
260			_bRastogi Publication
260			_c1992
650			_aEcology and Environment
942			_cBK
999			_c15138 _d15138