21 | Add to Reading ListSource URL: www.dnr.mo.govLanguage: English - Date: 2007-02-14 12:32:52
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22 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-10-29 00:43:48
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23 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-10-28 20:43:48
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24 | Add to Reading ListSource URL: www.uky.eduLanguage: English - Date: 2008-12-21 12:05:27
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25 | Add to Reading ListSource URL: www.uky.eduLanguage: English - Date: 2008-12-21 12:05:14
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26 | Add to Reading ListSource URL: www.earthlearningidea.comLanguage: English - Date: 2012-06-14 11:12:57
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27 | Add to Reading ListSource URL: instaar.colorado.eduLanguage: English - Date: 2003-07-23 11:25:40
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28 | Add to Reading ListSource URL: 178.250.76.106Language: English - Date: 2012-06-14 11:12:57
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29 | Add to Reading ListSource URL: www.visitbloomington.comLanguage: English - Date: 2014-06-17 14:45:08
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30 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 16:56:14
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