21 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-01-29 12:17:43
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22 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-03-12 07:23:44
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23 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 09:15:36
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24 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:16:52
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25 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-02-21 13:56:32
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26 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-03-22 14:51:17
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27 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-04-24 14:46:21
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28 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-06-25 14:00:47
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29 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2008-04-08 18:10:58
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30 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-04-05 14:29:34
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