51 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-31 12:23:50
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52 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-02-05 14:22:30
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53 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-02-01 13:52:56
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54 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-04-30 13:14:02
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55 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-02-26 08:58:05
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56 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-07-24 16:59:10
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57 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-04-15 16:16:12
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58 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-11-15 17:20:38
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59 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2005-01-12 14:37:42
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60 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-04-15 16:35:30
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