21 | Add to Reading ListSource URL: paleo.cortland.eduLanguage: English - Date: 2009-04-07 19:53:49
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22 | Add to Reading ListSource URL: www.aipea.orgLanguage: English - Date: 2015-03-31 07:19:06
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23 | Add to Reading ListSource URL: stratigraphy.orgLanguage: English - Date: 2013-02-14 09:32:11
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24 | Add to Reading ListSource URL: cgi-iugs.orgLanguage: English - Date: 2008-04-11 08:15:19
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25 | Add to Reading ListSource URL: rock.geosociety.orgLanguage: English - Date: 2016-02-03 16:05:41
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26 | Add to Reading ListSource URL: www.earthsciencematters.orgLanguage: English - Date: 2011-12-08 06:20:08
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27 | Add to Reading ListSource URL: medicalgeology.orgLanguage: English - Date: 2015-09-03 16:37:45
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28 | Add to Reading ListSource URL: iugs.orgLanguage: English - Date: 2016-08-11 17:35:10
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29 | Add to Reading ListSource URL: www.aipea.orgLanguage: English - Date: 2015-03-31 07:18:51
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30 | Add to Reading ListSource URL: www.iugscoge.orgLanguage: English - Date: 2012-04-11 22:43:50
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