An environmental study of artisanal, small, and medium mining in Bolivia, Chile, and Peru 
by Gary McMahon...[et.al.] 
 - Washington, D.C.  World Bank  1999 
 - 61p. 
 - World Bank technical paper no.429 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineral industries - Peru<br/>Mineral industries - Environmental aspects - Chile<br/>Mineral industries - Environmental aspects - Bolivia
<br/><br/><label>Dewey Class. No.: </label>Y21x84 M227