Vigil,Kenneth. M <br/><br/>
Clean Water :  an introduction to water quality and water pollution / 

 - 2ed. 
 - U S A :  Oregon State University Press :  c2003 
 - 181 P . : 
<br/><br/>Includes Index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water Purification
<br/><br/><label>Dewey Class. No.: </label>363.7364  / V677c