Stevens, Leonard A. <br/><br/>
Clean water :  nature's way to stop pollution / 
by Leonard A. Stevens. 
 - New York :  Dutton,  1974. 
 - xii, 289 p. :  ill. ;  22 cm. 
<br/><br/><label>ISBN: </label>0876901038 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage irrigation.