00498nam a22001697a 450000500170000001000150001702000260003203500130005803700130007108200170008410000160010124500530011726000380017027000550020830000250026350000400028820150519144018.0  aENG-112717  a9788180210286c400.00  aEN-96249  bDBAD/PUB  a363.73940954  aSingh, Alka  aA hand book of water pollution /cby Alka Singh   aDelhi bParikrama Prakashanc2014  aD-1/13, East Gokalpur, Loni Road, bDelhi e110094  aviii,144p.c23cm(Hb)  aIncludes bibliographical references