21 | Add to Reading ListSource URL: www.beg.utexas.eduLanguage: English - Date: 2010-02-16 14:52:10
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22 | Add to Reading ListSource URL: www.beg.utexas.eduLanguage: English - Date: 2009-05-08 14:10:10
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23 | Add to Reading ListSource URL: www.beg.utexas.eduLanguage: English - Date: 2009-09-17 15:54:41
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24 | Add to Reading ListSource URL: digital.library.unt.eduLanguage: English - Date: 2015-03-03 11:22:25
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25 | Add to Reading ListSource URL: www.au.agwscam.comLanguage: English - Date: 2012-11-27 20:04:19
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26 | Add to Reading ListSource URL: www.makogon.comLanguage: English - Date: 2014-06-24 23:41:18
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27 | Add to Reading ListSource URL: www.jogmec.go.jpLanguage: English - Date: 2014-03-27 21:39:06
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28 | Add to Reading ListSource URL: petroleum.nic.inLanguage: English - Date: 2014-09-04 23:55:28
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29 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2009-07-29 19:12:48
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30 | Add to Reading ListSource URL: www.boem.govLanguage: English - Date: 2012-09-21 10:53:04
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