71 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-29 09:18:25
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72 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-07-13 07:10:14
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73 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-01-31 09:56:38
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74 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-04-18 12:37:50
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75 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-07-16 10:42:52
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76 | Add to Reading ListSource URL: www.azurspace.comLanguage: English - Date: 2012-12-06 07:51:38
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77 | Add to Reading ListSource URL: www.engr.colostate.eduLanguage: English - Date: 2007-07-14 14:17:42
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78 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-04-11 14:10:05
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79 | Add to Reading ListSource URL: www.azurspace.comLanguage: English - Date: 2012-10-01 15:35:04
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80 | Add to Reading ListSource URL: www.semiconductor-today.comLanguage: English - Date: 2011-01-24 15:20:39
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