11 | Add to Reading ListSource URL: publicmind.fdu.eduLanguage: English - Date: 2013-01-09 21:18:42
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12 | Add to Reading ListSource URL: ecedweb.unomaha.eduLanguage: English - Date: 2014-10-27 15:52:42
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13 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-10-29 00:43:32
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14 | Add to Reading ListSource URL: und.eduLanguage: English - Date: 2013-01-25 12:40:26
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15 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-10-28 20:43:32
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16 | Add to Reading ListSource URL: big.assets.huffingtonpost.comLanguage: English - Date: 2013-06-18 11:15:57
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17 | Add to Reading ListSource URL: instaar.colorado.eduLanguage: English - Date: 2011-04-19 20:38:40
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18 | Add to Reading ListSource URL: www.ccthita.orgLanguage: English - Date: 2005-10-28 12:44:13
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19 | Add to Reading ListSource URL: commons.esipfed.orgLanguage: English - Date: 2014-07-15 17:23:44
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20 | Add to Reading ListSource URL: commons.esipfed.orgLanguage: English - Date: 2014-07-15 17:39:26
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