Crites, Ronald W. , <br/><br/>
Natural wastewater treatment systems / 
Ronald W. Crites, E. Joe Middlebrooks, Sherwood C. Reed. 
 - 552 pages :  illustrations ;  23 cm. 
 - Civil and environmental engineering ;  19 .
<br/><br/><label>ISBN: </label>0849338042 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage --Purification --Biological treatment.<br/>Sewage sludge --Management.
<br/><br/><label>LC Class. No.: </label>TD755   / .C74 2006