51 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-11-06 18:18:24
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52 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-11-09 15:05:48
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53 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-02-07 08:38:05
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54 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-06-06 10:58:07
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55 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-11-21 07:56:30
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56 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2008-03-20 11:56:37
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57 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:17:22
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58 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-01-30 07:45:46
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59 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-03-20 09:18:16
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60 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-06-21 12:47:24
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