851 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-02-04 07:31:23
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852 | Add to Reading ListSource URL: press.princeton.eduLanguage: English - Date: 2010-05-14 15:44:58
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853 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-11-15 08:17:08
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854 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-03-24 09:51:30
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855 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-03-12 12:38:27
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856 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-06-01 12:44:53
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857 | Add to Reading ListSource URL: www.cilo.netLanguage: English - Date: 2013-09-12 13:05:46
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858 | Add to Reading ListSource URL: www.dot.state.mn.usLanguage: English - Date: 2014-03-19 12:55:01
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859 | Add to Reading ListSource URL: www.iowahistory.orgLanguage: English - Date: 2013-12-18 16:27:02
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860 | Add to Reading ListSource URL: www.clevelandfed.orgLanguage: English - Date: 2005-09-23 17:27:52
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