00761cam a2200241 i 45000010008000000030005000080050017000130080041000300100017000710200028000880400018001160500019001340820017001531000030001702450103002002600071003033000034003745000020004085010008004285040032004366500035004687000016005032263860NUST20170613120046.0780914s1980    enka     b    001 0 eng    a   78011371   a0521224950.a0521295254  aDLCcDLCdDLC00aQH545.S49bW4400a574.5263 WEL1 aWelch, E. B.q(Eugene B.)10aEcological effects of waste water /cE.B. Welch ; with hydrographic characteristics by T. Lindell.  aCambridge [Eng.] ;aNew York :bCambridge University Press,c1980.  axii, 337 p. :bill. ;c24 cm.  aIncludes index.  aH.B  aBibliography: p. [310]-327. 0aSewagexEnvironmental aspects.1 aLindell, T.