51 | Add to Reading ListSource URL: www.scofield.comLanguage: English - Date: 2015-01-28 16:37:05
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52 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2015-05-19 14:04:42
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53 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2000-12-08 09:19:03
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54 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2000-02-15 10:40:59
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55 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1997-07-08 08:36:05
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56 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2005-06-16 10:03:28
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57 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English |
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58 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2007-08-30 08:44:52
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59 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2001-11-27 10:23:56
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60 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2008-09-17 17:32:28
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