251 | Add to Reading ListSource URL: mineralsciences.si.eduLanguage: English - Date: 2006-09-22 15:51:54
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252 | Add to Reading ListSource URL: www.soest.hawaii.eduLanguage: English - Date: 2009-08-27 15:46:57
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253 | Add to Reading ListSource URL: www.newyorkfed.orgLanguage: English - Date: 2012-09-14 16:44:42
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254 | Add to Reading ListSource URL: water.usgs.govLanguage: English - Date: 2001-07-09 17:46:20
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255 | Add to Reading ListSource URL: water.usgs.govLanguage: English - Date: 2011-01-28 09:49:36
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256 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2010-04-12 10:43:58
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257 | Add to Reading ListSource URL: water.usgs.govLanguage: English - Date: 2008-09-05 13:32:30
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258 | Add to Reading ListSource URL: www.niaid.nih.govLanguage: English - Date: 2013-01-10 11:13:00
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259 | Add to Reading ListSource URL: www.wnlsd.caLanguage: English - Date: 2012-12-19 12:13:00
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260 | Add to Reading ListSource URL: atomic.ccs.neu.eduLanguage: English - Date: 2012-08-31 10:45:46
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