000 00269nam a2200109Ia 4500
008 220201s1997 xx 000 0 eng d
100 _aRAO, C.S.
245 0 _aENVIRONMENTAL POLLUTION CONTROL ENGINEERING
260 _bNEW AGE INT.
_c1997
300 _a431
942 _2ddc
999 _c67714
_d67714