Rich, Linvil Gene. <br/><br/>
Low-maintenance, mechanically simple wastewater treatment systems / 
Linvil G. Rich. 
 - New York :  McGraw-Hill,  c1980. 
 - viii, 211 p. :  ill. ;  24 cm. 
 - McGraw-Hill series in water resources and environmental engineering. .
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0070522529 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Purification.