000			00314nam a2200145Ia 4500
100			_aChaurasia, B. P.
020			_a81-85613-67-2
365			_b500
942			_cBK
654			_a
245			_aEnvironmental pollution
260			_aAllahabad _bChugh Publications _c1992
082			_a574.5
300			_axxi,413
999			_c409802 _d409802
041			_aeng