Helfferich, F.  <br/><br/>
Ion exchange  (Book) 

 - New York  McGraw-Hill  1962 
 - 624p.  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ion exchange
<br/><br/><label>Universal Decimal Class. No.: </label>541.123.54 HEL  / 9843