00373nam a2200109 a 4500082001500000100001200015245004500027260003700072300001300109650008200122856005900204  a628.162LAL1 aLal, D.10aWater supply and waste water engineering  aNew Delhi :bS.K Kataria,c2011.  a196 p. ;  aSewage--PurificationaSewage--Purification--Biological treatmentaWater reuse40uhttp://www.amazon.com/exec/obidos/ASIN/chopaconline-20