Harvey, Henry. <br/><br/>
Harvey's pet code,  on the A. B. C. self-indexing plan ... 

 - New York,  H. Harvey,  c1888. 
 - 1 p. l., 160 p.  15 cm. 
<br/><br/><label>LCCN: </label>ca 07003469  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cipher and telegraph codes.
<br/><br/><label>LC Class. No.: </label>HE7673  / .H382