Welch, E.B. <br/><br/>
Ecological effects of waster water / 
E.B. Welch with hydrographic characteriction by T. Lindell 
 - Cambridge,  The University Press,  c1980 
 - xii, 337 p.;  22 cm. 
<br/><br/> Includes index 
<br/><br/>Bibliography: p. 310-328 
<br/><br/><label>ISBN: </label>0521295254  £ 15.00 0521224950 hpk 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Environemental aspects<br/>Sewage--Purification<br/>Water quality
<br/><br/><label>Dewey Class. No.: </label>628.16