861 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2005-06-16 14:33:26
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862 | Add to Reading ListSource URL: www.michigan.govLanguage: English - Date: 2013-05-03 14:46:09
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863 | Add to Reading ListSource URL: www.ghsa.orgLanguage: English - Date: 2012-03-02 09:47:14
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864 | Add to Reading ListSource URL: www.anr.state.vt.usLanguage: English - Date: 2011-06-14 12:30:19
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865 | Add to Reading ListSource URL: www.michigan.govLanguage: English - Date: 2014-04-28 16:07:24
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866 | Add to Reading ListSource URL: www.michigan.govLanguage: English - Date: 2014-05-19 12:48:38
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867 | Add to Reading ListSource URL: www.michigan.govLanguage: English - Date: 2014-05-20 08:34:09
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868 | Add to Reading ListSource URL: www.hou.usra.eduLanguage: English - Date: 2014-04-24 17:29:41
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869 | Add to Reading ListSource URL: www.msha.govLanguage: English - Date: 2014-07-24 11:38:44
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870 | Add to Reading ListSource URL: crustal.usgs.govLanguage: English - Date: 2012-01-30 17:59:57
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