21 | Add to Reading ListSource URL: www.anr.state.vt.usLanguage: English - Date: 2013-05-22 11:24:59
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22 | Add to Reading ListSource URL: www.ed.gov.nl.caLanguage: English - Date: 2009-03-02 10:37:10
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23 | Add to Reading ListSource URL: www.anr.state.vt.usLanguage: English - Date: 2013-03-07 10:21:58
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24 | Add to Reading ListSource URL: www.maine.govLanguage: English - Date: 2013-09-17 12:24:27
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25 | Add to Reading ListSource URL: dnr.alaska.govLanguage: English - Date: 2014-01-13 15:24:14
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26 | Add to Reading ListSource URL: www.geology.sdsu.eduLanguage: English - Date: 2008-08-30 15:04:25
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27 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-08-26 12:47:00
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28 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-08-26 12:47:00
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29 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-08-26 12:47:00
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30 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-08-26 12:47:00
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