Delfs H <br/><br/>
Introduction to cryptography 

 - Germany  Springer Verlag        1900 
 - 310p. ill.  cm 
<br/><br/><label>ISBN: </label>000000 (pbk) 
<br/><br/><label>Standard No.: </label>198686 
<br/><br/><label>Source: </label> Textual