151 | Add to Reading ListSource URL: www.devonenergy.comLanguage: English - Date: 2011-06-15 15:11:19
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152 | Add to Reading ListSource URL: www.dnr.state.oh.usLanguage: English - Date: 2011-04-06 08:05:51
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153 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2003-01-22 11:33:36
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154 | Add to Reading ListSource URL: mjlst.umn.eduLanguage: English - Date: 2013-08-12 15:25:10
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155 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2002-01-30 12:32:12
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156 | Add to Reading ListSource URL: foundation.aapg.orgLanguage: English - Date: 2007-05-03 13:40:23
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