00573cam a2200181   4500001001100000005001700011008004100028020001500069100002100084245008200105250000900187260004100196264004100237300003700278500002700315650003000342700001900372000000127820230921135915.0150417e198700   xx           000 0 eng d  a81204021541 aRao, Narayana M.10aWaste water treatment :brational methods of design and industrial practices.  a2nd.  aNew Delhi :bOxford and IBH,cc1987.  aNew Delhi :bOxford and IBH,cc1987.  aviii, 345pages  : illustrations.  aIncludes Bibliography. 0aWater quality management.1 aDatta, Amal K.