421 | Add to Reading ListSource URL: www.spe.orgLanguage: English - Date: 2013-01-31 14:45:14
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422 | Add to Reading ListSource URL: www.spe.orgLanguage: English - Date: 2011-05-11 17:52:48
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423 | Add to Reading ListSource URL: www.nov.comLanguage: English - Date: 2012-05-22 10:12:02
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424 | Add to Reading ListSource URL: www.geo365.noLanguage: English - Date: 2007-06-05 02:40:56
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425 | Add to Reading ListSource URL: www.crtc.gc.caLanguage: English - Date: 2009-04-08 14:47:20
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426 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-01-20 12:01:40
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427 | Add to Reading ListSource URL: www.innovoil.co.ukLanguage: English - Date: 2012-07-31 17:31:55
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428 | Add to Reading ListSource URL: drillingcontractor.orgLanguage: English - Date: 2010-10-16 20:08:37
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429 | Add to Reading ListSource URL: etd.lsu.eduLanguage: English - Date: 2006-05-18 12:24:19
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430 | Add to Reading ListSource URL: c14503045.r45.cf2.rackcdn.comLanguage: English - Date: 2012-04-18 20:02:50
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