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

 - 2nd ed. 
 - New York  John Wiley  1936 
 - xi,145 p. 
<br/><br/><label>ISBN: </label>0471085146 
<br/><br/><label>Dewey Class. No.: </label>622  / BOE