51 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-01-18 11:54:21
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52 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-09-18 06:31:10
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53 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-01-19 07:40:07
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54 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-11-21 08:31:55
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55 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-04-19 13:46:51
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56 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-01-20 10:50:22
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57 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-22 11:51:42
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58 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-12-11 09:49:13
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59 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-04-21 09:34:18
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60 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-04-04 12:56:14
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