Friedrich Helfferich <br/><br/>
Ion Exchange 

 - New York  McGraw Hill Book Co.  1962 
 - 621p 
<br/><br/>Friedrich Helfferich: Ion Exchange.  New York.  McGraw Hill Book Co., 1962.--(541.3723HEL)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>541.3723  / HEL