Copper production in developing countries :  report. 

 - New York :  United Nations,  1972. 
 - [United Nations. Document] ;  ID/80, ID/WG.74/16 .
 - Document (United Nations) ;  ID/80, ID/WG.74/16 .
<br/><br/> "United Nations publication. Sales no.: E.72.II.B.13."  At head of title: United Nations Industrial Development Organization, Vienna. 
<br/><br/><label>LCCN: </label>74153630 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Copper industry and trade -- Developing countries -- Congresses.--Copper industry and trade -- Developing countries -- Congresses.--Copper industry and trade -- Developing countries -- Congresses.