251 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2015-01-30 08:41:35
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252 | Add to Reading ListSource URL: scholar.lib.vt.eduLanguage: English - Date: 2009-12-10 10:44:26
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253 | Add to Reading ListSource URL: scholar.lib.vt.eduLanguage: English - Date: 2009-12-10 10:44:27
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254 | Add to Reading ListSource URL: scholar.lib.vt.eduLanguage: English - Date: 2011-09-16 13:49:29
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255 | Add to Reading ListSource URL: scholar.lib.vt.eduLanguage: English - Date: 2010-02-18 13:01:44
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256 | Add to Reading ListSource URL: www.dcprinciples.orgLanguage: English - Date: 2010-01-21 09:48:51
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257 | Add to Reading ListSource URL: www.floridaacademyofsciences.orgLanguage: English - Date: 2015-01-18 15:26:55
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258 | Add to Reading ListSource URL: www.rsc.orgLanguage: English - Date: 2014-08-18 09:15:40
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259 | Add to Reading ListSource URL: www.uk.sagepub.comLanguage: English - Date: 2015-02-06 05:04:17
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260 | Add to Reading ListSource URL: www.stat.tamu.eduLanguage: English - Date: 2004-05-30 15:44:22
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