441 | Add to Reading ListSource URL: www.shalegas.energy.govLanguage: English - Date: 2013-10-24 13:48:01
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442 | Add to Reading ListSource URL: www.shalegas.energy.govLanguage: English - Date: 2013-10-24 13:48:00
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443 | Add to Reading ListSource URL: www.shalegas.energy.govLanguage: English - Date: 2013-10-24 13:48:01
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444 | Add to Reading ListSource URL: www.rpsgroup.comLanguage: English - Date: 2013-03-07 06:15:23
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445 | Add to Reading ListSource URL: www.chk.comLanguage: English - Date: 2013-07-31 16:36:39
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446 | Add to Reading ListSource URL: thegwpf.orgLanguage: English - Date: 2012-08-23 13:06:32
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447 | Add to Reading ListSource URL: www.halliburton.comLanguage: English - Date: 2012-04-20 12:40:53
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448 | Add to Reading ListSource URL: www.smithschool.ox.ac.ukLanguage: English - Date: 2013-09-30 08:45:12
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449 | Add to Reading ListSource URL: www.climateactionprogramme.orgLanguage: English - Date: 2013-07-26 08:55:34
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450 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-07-15 09:30:02
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