NALCO water handbook 

 - New York:   McGraw-Hill Book Company,   1979 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science 
<br/><br/><label>Subjects--Index Terms: </label>NALCO  
<br/><br/><label>Universal Decimal Class. No.: </label>R 628.1(02)  / L9