61 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-04-21 15:14:15
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62 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-10-11 11:09:09
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63 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-06-13 18:24:22
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64 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-11-20 11:51:46
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65 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-12-30 17:16:00
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66 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-07-03 11:19:12
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67 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-09-13 16:11:56
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68 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-10-30 07:59:02
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69 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-28 13:54:12
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70 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 10:35:54
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