161 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-01-18 14:12:35
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162 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-12-19 17:11:26
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163 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-04-15 12:19:02
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164 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-03-28 13:20:35
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165 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2008-05-21 15:55:28
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166 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-03-24 14:51:50
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167 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-06-06 13:33:21
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168 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-01-22 14:56:10
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169 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2005-11-01 09:20:19
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170 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:48
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