Katzan,Harry <br/><br/>
The standard data encryption algorithm 

 - New Delhi  Petrocelli Books  1991 
 - viii,134p. 
<br/><br/><label>ISBN: </label>0894330160 
<br/><br/><label>Subjects--Index Terms: </label>data encryption 
<br/><br/><label>Dewey Class. No.: </label>005.82  / KAT