Mineral Markets. Copper's Confidence Sags 

 -  SEGEMAR  1989 
<br/><br/> Mining Journal, London, October 27, 1989, Pags. 351/352 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Estadisticas Mineras<br/>Artsub
<br/><br/><label>Subjects--Index Terms: </label>Mineral/es: Cobre