Rich, Linvil Gene,  1921-. <br/><br/>
Low-maintenance, mechanically simple wastewater treatment systems / 
Linvil G. Rich. 
 - New York :  McGraw-Hill,  1980. 
 - viii, 211 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0070522529 
<br/><br/><label>LCCN: </label>79-009046 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Purification.