51 | Add to Reading ListSource URL: ag.udel.eduLanguage: English - Date: 2014-02-10 14:34:31
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52 | Add to Reading ListSource URL: www.ipa.udel.eduLanguage: English - Date: 2005-04-13 09:26:06
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53 | Add to Reading ListSource URL: ag.udel.eduLanguage: English - Date: 2008-09-18 11:02:31
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54 | Add to Reading ListSource URL: ag.udel.eduLanguage: English - Date: 2005-08-07 12:08:11
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55 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2007-08-15 15:12:49
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56 | Add to Reading ListSource URL: www.uky.eduLanguage: English - Date: 2008-12-21 12:03:54
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57 | Add to Reading ListSource URL: www.dgs.udel.eduLanguage: English - Date: 2009-07-06 12:06:18
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58 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-06-30 10:21:57
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59 | Add to Reading ListSource URL: www.uky.eduLanguage: English - Date: 2009-01-02 21:00:55
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60 | Add to Reading ListSource URL: www.erh.noaa.govLanguage: English - Date: 2005-05-04 14:16:03
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