Gray  <br/><br/>
Biology of wastewater treatment  
/ N. F. Gray. 
 - 2nd ed.. 
 - Covent Garden  Imperial College Press  2004. 
 - xviii, 1421p.  ill.  23cm 
 - Series On Environmental Science and Management .
<br/><br/> Includes index p.1395 - 1421 
<br/><br/><label>ISBN: </label>1860943284  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biotechnology<br/>Sewage disposal<br/>Sewage--Purification--Biological treatment
<br/><br/><label>Dewey Class. No.: </label>628.351 GRA 2004