511 | Add to Reading ListSource URL: www.ngdc.noaa.govLanguage: English - Date: 2010-10-20 14:54:12
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512 | Add to Reading ListSource URL: www.ngdc.noaa.govLanguage: English - Date: 2010-10-21 12:01:40
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513 | Add to Reading ListSource URL: www.trc.nist.govLanguage: English - Date: 2003-12-15 12:08:57
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514 | Add to Reading ListSource URL: www.trc.nist.govLanguage: English - Date: 2003-12-15 12:08:42
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515 | Add to Reading ListSource URL: www.trc.nist.govLanguage: English - Date: 2003-12-15 12:08:58
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516 | Add to Reading ListSource URL: www.ias.ac.inLanguage: English - Date: 2014-04-02 08:13:01
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517 | Add to Reading ListSource URL: www.its.caltech.eduLanguage: English - Date: 2011-12-21 22:17:29
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518 | Add to Reading ListSource URL: www.its.caltech.eduLanguage: English - Date: 2008-12-07 16:00:36
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519 | Add to Reading ListSource URL: www.cfa.harvard.eduLanguage: English - Date: 2014-06-11 11:54:11
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520 | Add to Reading ListSource URL: science-ed.pnnl.govLanguage: English - Date: 2011-02-04 12:26:08
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