11 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2008-04-18 14:20:27
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12 | Add to Reading ListSource URL: www.gpo.govLanguage: English - Date: 2010-12-02 08:55:54
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13 | Add to Reading ListSource URL: www.gpo.govLanguage: English - Date: 2010-12-02 08:57:53
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14 | Add to Reading ListSource URL: www.usc.eduLanguage: English - Date: 2014-04-25 17:11:48
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15 | Add to Reading ListSource URL: capstone.dodlive.milLanguage: English |
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16 | Add to Reading ListSource URL: ecee.colorado.eduLanguage: English - Date: 2012-01-05 18:25:54
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17 | Add to Reading ListSource URL: www.pnas.orgLanguage: English - Date: 2005-08-08 12:51:55
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