Friedman, William F. <br/><br/>
Elements of cryptanalysis 
William F. Friedman 
 - California  Aegean Park Press  c1976 
 - 172 p. 
<br/><br/>Part 1: The Analysis of Ciphers (Page-6), Part 2: The Analysis of codes (Page-84-91). 
<br/><br/><label>ISBN: </label>0894120026 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography
<br/><br/><label>Dewey Class. No.: </label>005.82,FRI