41 | Add to Reading ListSource URL: www.uky.eduLanguage: English - Date: 2008-11-18 10:06:56
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42 | Add to Reading ListSource URL: www.geology.ar.govLanguage: English - Date: 2013-05-06 16:00:12
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43 | Add to Reading ListSource URL: www.nysm.nysed.govLanguage: English - Date: 2011-05-02 10:04:06
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44 | Add to Reading ListSource URL: www.earthlearningidea.comLanguage: English - Date: 2008-12-07 06:48:30
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45 | Add to Reading ListSource URL: www.nextgenscience.orgLanguage: English - Date: 2013-05-21 11:30:00
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46 | Add to Reading ListSource URL: www.msu.eduLanguage: English - Date: 2006-07-07 09:42:15
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47 | Add to Reading ListSource URL: www.ed.gov.nl.caLanguage: English - Date: 2009-03-02 10:37:10
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48 | Add to Reading ListSource URL: www.nevadamining.orgLanguage: English - Date: 2014-01-13 19:26:39
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49 | Add to Reading ListSource URL: 178.250.76.106Language: English - Date: 2008-12-07 06:48:30
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50 | Add to Reading ListSource URL: www.arkansashighways.comLanguage: English - Date: 2009-09-11 15:58:22
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