21 | Add to Reading ListSource URL: schulich.ucalgary.caLanguage: English - Date: 2016-03-16 13:36:11
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22 | Add to Reading ListSource URL: www.ncgeolsoc.orgLanguage: English - Date: 2010-11-16 21:45:55
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23 | Add to Reading ListSource URL: asapgas.agdc.usLanguage: English - Date: 2013-10-04 00:24:37
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24 | Add to Reading ListSource URL: www.equatorialoil.comLanguage: English - Date: 2014-11-13 10:04:00
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25 | Add to Reading ListSource URL: static.ark.orgLanguage: English - Date: 2013-06-14 12:08:17
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26 | Add to Reading ListSource URL: www.indianaffairs.govLanguage: English - Date: 2016-07-11 18:41:16
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27 | Add to Reading ListSource URL: geologie.univie.ac.atLanguage: English - Date: 2016-04-27 08:24:04
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28 | Add to Reading ListSource URL: pttc.mines.eduLanguage: English - Date: 2008-01-11 03:00:00
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29 | Add to Reading ListSource URL: www.gondwanaresearch.comLanguage: English - Date: 2011-12-04 09:32:45
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30 | Add to Reading ListSource URL: www.chemostrat.comLanguage: English - Date: 2015-12-22 06:24:51
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