151 | Add to Reading ListSource URL: ag.udel.eduLanguage: English - Date: 2006-01-25 14:46:49
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152 | Add to Reading ListSource URL: www.dgs.udel.eduLanguage: English - Date: 2011-03-03 11:37:19
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153 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2012-11-05 11:49:41
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154 | Add to Reading ListSource URL: ag.udel.eduLanguage: English - Date: 2007-12-11 15:33:05
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155 | Add to Reading ListSource URL: www.ipa.udel.eduLanguage: English - Date: 2005-04-13 09:26:06
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156 | Add to Reading ListSource URL: www.dgs.udel.eduLanguage: English - Date: 2010-08-12 15:04:45
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157 | Add to Reading ListSource URL: www.dgs.udel.eduLanguage: English - Date: 2010-03-26 11:12:17
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158 | Add to Reading ListSource URL: ag.udel.eduLanguage: English - Date: 2009-12-04 10:09:08
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159 | Add to Reading ListSource URL: ag.udel.eduLanguage: English - Date: 2008-09-18 11:02:31
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160 | Add to Reading ListSource URL: ag.udel.eduLanguage: English - Date: 2006-08-24 13:54:39
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