11 | Add to Reading ListSource URL: www.blm.govLanguage: English - Date: 2011-06-15 11:24:26
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12 | Add to Reading ListSource URL: www.blm.govLanguage: English - Date: 2014-07-31 12:29:07
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13 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-07-18 18:12:51
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14 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2005-01-12 10:41:10
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15 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 09:01:05
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16 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2008-01-31 15:00:24
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17 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-03-22 14:57:28
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18 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-01-29 11:17:58
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19 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-08-15 11:04:12
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20 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-01-13 14:06:43
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