81 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-07-11 18:27:30
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82 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-11-29 09:11:15
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83 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-10-05 11:04:26
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84 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-04-04 13:49:26
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85 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2009-04-13 15:55:34
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86 | Add to Reading ListSource URL: www.cliffsnaturalresources.comLanguage: English - Date: 2012-02-07 16:24:53
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87 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-02-26 14:58:00
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88 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2012-08-07 13:53:06
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89 | Add to Reading ListSource URL: www.occ.caLanguage: English - Date: 2014-02-21 12:36:35
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90 | Add to Reading ListSource URL: www.durhamprosperity.orgLanguage: English - Date: 2014-02-26 15:54:41
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