11 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-03-06 09:22:19
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12 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-05-12 12:44:38
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13 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-05-12 12:44:37
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14 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-02-01 10:44:52
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15 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-09-19 10:40:51
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16 | Add to Reading ListSource URL: www.polisheng.caLanguage: English - Date: 2014-05-05 22:52:45
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17 | Add to Reading ListSource URL: www.geology.arkansas.govLanguage: English - Date: 2008-09-03 15:21:31
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18 | Add to Reading ListSource URL: www.dhr.virginia.govLanguage: English - Date: 2007-05-14 11:33:50
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19 | Add to Reading ListSource URL: pdf.secdatabase.comLanguage: English - Date: 2012-06-03 03:55:41
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