61 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:11:56
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62 | Add to Reading ListSource URL: www.gwiktn.orgLanguage: English - Date: 2014-03-04 14:33:25
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63 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-11-09 11:17:22
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64 | Add to Reading ListSource URL: ygtainternational.files.wordpress.comLanguage: English - Date: 2013-06-26 12:20:20
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65 | Add to Reading ListSource URL: www2.epa.govLanguage: English - Date: 2014-08-22 10:57:42
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66 | Add to Reading ListSource URL: www.iatse411.caLanguage: English - Date: 2013-11-05 11:54:37
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67 | Add to Reading ListSource URL: www.iatse411.caLanguage: English - Date: 2014-06-10 16:50:02
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68 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:13:30
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69 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2007-08-31 11:13:30
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70 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 09:13:26
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