Sinkov, Abraham <br/><br/>
Elementary cryptanalysis  a mathematical approach. 

 - [New York]  Random House  [c1968] 
 - ix, 189 p.  23 cm. 
 - New mathematical library  22 .
<br/><br/>Bibliography: p. 184-186. 
<br/><br/><label>LCCN: </label>72089953  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography.<br/>Ciphers.
<br/><br/><label>LC Class. No.: </label>Z104  / .S47 
<br/><br/><label>Dewey Class. No.: </label>652.8