000			00346nam a2200145Ia 4500
008			161018s9999 xx 000 0 und d
020			_a9788190890809
100			_aRavikrisnan.A _92960
245			_aEnvironmental Science Engineering
250			_a7th
260			_bSri Krishna
300			_a1.2 to G5 _bRs:375
490			_a18781
942			_02
999			_c18781 _d18781