Helfferich, Friedrich <br/><br/>
Ion exchange 

 - New York  Dover Publications  1995 
 - ix, 624p.  
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>486687848 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ion exchange