Smith, Laurence Dwight <br/><br/>
Cryptography :  the science of secret writing / 
by Laurence Dwight Smith 
 - New York :  Dover Pub. Inc.,  1943 
 - 164 p. ;  21 cm. 
<br/><br/> Includes index 
<br/><br/><label>LCCN: </label>55-4373 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography