11 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-10-12 17:01:27
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12 | Add to Reading ListSource URL: eiti.orgLanguage: English - Date: 2013-01-29 03:41:33
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13 | Add to Reading ListSource URL: large.stanford.eduLanguage: English - Date: 2010-12-10 18:05:40
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14 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-08-26 12:23:14
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15 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-03-20 14:13:49
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16 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2008-05-21 11:02:00
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