Boericke, William F. <br/><br/>
Prospecting and operating small gold placers. 

 - New York :  J.Wiley & Sons,  1936. 
 - 144 p. :  il. ;  19 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Minería<br/>Explotación minera
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>622.271