141 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-06-08 10:51:28
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142 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-09-14 10:20:20
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143 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 08:56:59
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144 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-06-12 14:29:04
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145 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-05-07 10:04:34
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146 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-02-22 08:10:58
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147 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-11-14 11:27:27
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148 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-05-24 13:53:31
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149 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-02-06 13:50:36
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150 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 10:51:45
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