Reed, Joseph Verner <br/><br/>
Fun with codes/ 
Joseph Verner Reed 
 - London:  Pelham Books,  1968 
 - 59 p.;  23 cm. 
<br/><br/><label>ISBN: </label>720400140 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptology<br/>Signs and symbols<br/>Symbolism
<br/><br/><label>Dewey Class. No.: </label>652.8