Sarnoff, Jane <br/><br/>
The Code & Cipher Book / 
J. Sarnoff and R.  Ruffins 
 - New York :  Charles Scribner's Sons,  1975. 
 - 37 p. :  col. ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0-684-14246-5  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography<br/>Ciphers