Small mines development in precious metals / 
editors, Ta M. Li, Thomas M. Plouf. 
 - Littleton, Colo. :  Society of Mining Enginers,  1987. 
 - x, 238 p. :  ill. 
<br/><br/><label>ISBN: </label>0873350693 
<br/><br/><label>LCCN: </label>91024191 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Precious metals.<br/>Mining engineering