11 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-16 12:52:10
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12 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:07:54
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13 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-03-10 11:31:19
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14 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-04-07 10:13:11
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15 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-03-05 11:21:40
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16 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-08-15 13:51:08
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17 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-29 14:11:06
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18 | Add to Reading ListSource URL: ec.europa.euLanguage: English - Date: 2008-11-13 13:12:33
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19 | Add to Reading ListSource URL: www.oecd.orgLanguage: English - Date: 2013-01-16 09:34:55
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20 | Add to Reading ListSource URL: www.eurosaiwgea.orgLanguage: English - Date: 2010-06-02 05:37:43
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