Bloomer, John Godfrey, <br/><br/>
Pacific cryptography,  for the use of operators in mining stocks, mining superintendents, bankers and brokers, 
by J.G. Bloomer ... 
 - 2d ed. 
 - San Francisco,  J.G. Bloomer,  1874. 
 - 164. p.  19 cm. 
<br/><br/><label>LCCN: </label>ca 07003696  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cipher and telegraph codes--Mining.
<br/><br/><label>LC Class. No.: </label>HE7677.M6  / B62