American Water Works Association <br/><br/>
Water quality and treatment 

 - 3rd 
 - US  American Water Works Association  1979 
 - xiv, 214p. 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Water quality and treatment
<br/><br/><label>Dewey Class. No.: </label>628.16  / A45W