41 | Add to Reading ListSource URL: ncgmp.usgs.govLanguage: English - Date: 2010-07-12 12:34:02
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42 | Add to Reading ListSource URL: ncgmp.usgs.govLanguage: English - Date: 2010-06-17 14:48:38
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43 | Add to Reading ListSource URL: www.loc.govLanguage: English - Date: 2014-06-12 07:36:09
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44 | Add to Reading ListSource URL: www.ok.govLanguage: English - Date: 2014-03-12 10:56:52
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45 | Add to Reading ListSource URL: www.strc.chLanguage: English - Date: 2008-12-12 12:18:14
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46 | Add to Reading ListSource URL: hal.archives-ouvertes.frLanguage: English - Date: 2009-11-18 06:00:50
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