Barr, Thomas H. , <br/><br/>
Invitation to cryptology / 
Thomas H. Barr. 
 - xii, 396 pages :  illustrations ;  24 cm. 
<br/><br/><label>ISBN: </label>0130889768 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography.<br/>Ciphers.
<br/><br/><label>LC Class. No.: </label>Z103   / .B37 2002