111 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-01-19 09:05:41
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112 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1997-03-03 08:29:21
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113 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-09-02 09:19:20
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114 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-02-11 14:06:20
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115 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-02-05 10:07:30
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116 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:23
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117 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-03-07 17:00:20
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118 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2005-12-01 08:08:52
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119 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-06-21 10:36:45
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120 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:10
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