131 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-09-14 11:16:21
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132 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-02-01 13:03:31
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133 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-10-02 10:51:27
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134 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-06-15 11:05:58
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135 | Add to Reading ListSource URL: www.sciencestuff.comLanguage: English - Date: 2013-06-12 10:28:38
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136 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-11-19 12:56:14
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137 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-06-19 07:06:04
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138 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-08-02 13:17:50
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139 | Add to Reading ListSource URL: www.water.denver.co.govLanguage: English - Date: 2013-02-10 15:16:09
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140 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-02-03 16:18:28
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