Zinc supply constraints drive price Online Mining Journal Oct. 17 2006 <A HREF="http://www.mining-journal.com/wms_magazine/wms_Mag_Breaking_News.aspx?breaking_news_article_id=873" target="_blank">http://www.mining-journal.com/wms_magazine/wms_Mag_Breaking_News.aspx?breaking_news_article_id=873</A>