000 00281nam a2200121Ia 4500
008 220201s1993 xx 000 0 eng d
082 _a628
_bRAO
100 _aRao, M Narayana
245 0 _aEnvironmental engineering
260 _bTTTI Madras
_c1993
300 _a268
942 _2ddc
999 _c85728
_d85728