111 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-02-26 09:16:35
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112 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-01-19 09:04:03
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113 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-01-19 08:29:23
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114 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-02-01 13:41:24
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115 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2011-09-27 12:25:06
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116 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-03-07 16:38:45
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117 | Add to Reading ListSource URL: epa.govLanguage: English - Date: 2011-03-11 10:54:12
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118 | Add to Reading ListSource URL: narpm.trainex.orgLanguage: English - Date: 2012-11-28 13:20:58
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119 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-04-05 14:17:20
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120 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:08
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