Sinkov, Abraham <br/><br/>
Elementary cryptanalysis a mathematical approach, Vol.22 

 -  The Mathematical Association of America  1980 
 - ix,222 p. 
<br/><br/><label>ISBN: </label>9780883856222 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CIPHERS<br/>Cryptography<br/>MATHEMATICS
<br/><br/><label>Dewey Class. No.: </label>652.80151  / SIN