00277pam a2200121 a 4500020000500000041000800005082001500013100002100028245005800049250001000107260002700117300001100144  c  aeng  a628.3bECK  aW.W.Eckenfelder.  aIndustrial Water Pollution ControlhTextual Documents  a2000.  aNew DelhibMcGraw Hill  a584pg.