Biological nutrient removal (BNR) operation in wastewater treatment plants / 
prepared by the Biological Nutrient Removal (BNR) Operation in Wastewater Treatment Plants Task Force of the Water Environment Federation and the American Society of Civil Engineers/Environmental and Water Resources Institute 
 - New York :  McGraw-Hill,  2006 
 - xliv, 597 p. :  ill. ;  25 cm. 
 - WEF manual of practice ;  no. 29 ASCE/EWRI manuals and reports on engineering practice ;  no. 109 .
 - Manual of practice ;  no. 29 ASCE manuals and reports on engineering practice ;  no. 109 .
<br/><br/> 'Manual of practice no. 30'--Cover 
<br/><br/>Includes bibliographical refrences and index 
<br/><br/><label>ISBN: </label>0071464158  RM458.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Purification--Nutrient removal