Biofilm reactors 

 - Alexandria ; New York:  McGraw Hill, WEF Press,  2011 
 - xxxix, 565 p. : ill. ; 25 cm. 
<br/><br/><label>ISBN: </label>9780071737074 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage - Purification - Fixed-film biological process
<br/><br/><label>Dewey Class. No.: </label>628.35 WEF