Nicholas F Gray <br/><br/>
Biology Of Wastewater Treatment (2nd Edition) 

 - 2nd ed 
 -  Imperial College Press  2004 
 - Series on Environmental Science and Management .
<br/><br/><label>ISBN: </label>9781860943287 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Environmental <br/> General<br/>Biotechnology.,Sewage disposal.,Sewage--Purification--Biological treatment.<br/>TECHNOLOGY & ENGINEERING