000 00296nam a2200121Ia 4500
008 220201s1984 xx 000 0 eng d
082 _a628
_bALA
100 _aAlam singh ed.
245 0 _aEnvironmental engineering
260 _bInternational book treaders
_c1984
300 _a248
942 _2ddc
999 _c83604
_d83604