601 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-06-01 12:44:53
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602 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2006-10-04 15:00:48
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603 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2012-09-20 13:12:58
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604 | Add to Reading ListSource URL: www.nh.govLanguage: English - Date: 2013-06-10 12:48:10
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605 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-08-09 09:34:14
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606 | Add to Reading ListSource URL: his.cuahsi.orgLanguage: English - Date: 2008-07-10 14:50:54
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607 | Add to Reading ListSource URL: www.mnh.si.eduLanguage: English - Date: 2007-06-20 16:10:40
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608 | Add to Reading ListSource URL: www.lewisandclark.orgLanguage: English - Date: 2013-12-13 22:33:57
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609 | Add to Reading ListSource URL: www.lewisandclark.orgLanguage: English - Date: 2014-05-31 14:45:59
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610 | Add to Reading ListSource URL: mceer.buffalo.eduLanguage: English - Date: 2007-07-05 14:05:28
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