00504nam a2200181 a 450000500170000002000150001708200170003210000190004924500350006826000310010330000230013463000200015763000290017796400190020699700180022599900170024395200620026020251203091125.0  a0852268971  a628.168bVAR  aVarshney, C K.  aWater Pollution and Management  aDelhibWiley Easternc1983  a242p.b22 cm.cHB.  aWater Pollution  aWater rsource management  bEngcdefg_  a33113 LIBSC C  c30834d30834  00104070aPUbPUd1998-04-09l0o628.168 VARp33113yBK