141 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-08-07 12:27:47
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142 | Add to Reading ListSource URL: www.reslife.okstate.eduLanguage: English - Date: 2013-08-16 17:22:31
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143 | Add to Reading ListSource URL: www.facultyforthefuture.netLanguage: English - Date: 2010-08-02 07:10:03
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144 | Add to Reading ListSource URL: www.tulsagastech.comLanguage: English - Date: 2014-05-01 11:00:44
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145 | Add to Reading ListSource URL: energy.govLanguage: English - Date: 2013-04-08 10:45:33
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146 | Add to Reading ListSource URL: www.tulsagastech.comLanguage: English - Date: 2013-11-26 10:24:36
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147 | Add to Reading ListSource URL: keystonepipeline-xl.state.govLanguage: English - Date: 2014-01-31 03:29:34
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148 | Add to Reading ListSource URL: www.gwpc.orgLanguage: English - Date: 2012-11-01 10:07:30
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149 | Add to Reading ListSource URL: amhistory.si.eduLanguage: English - Date: 2003-11-17 13:42:57
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150 | Add to Reading ListSource URL: www.gwpc.orgLanguage: English - Date: 2013-10-03 11:47:02
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