991 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2011-04-06 12:15:01
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992 | Add to Reading ListSource URL: www.chem.uni-wuppertal.deLanguage: English - Date: 2014-05-16 03:51:05
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993 | Add to Reading ListSource URL: www.ncnr.nist.govLanguage: English - Date: 2004-12-02 11:55:41
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994 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-07-24 14:00:00
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995 | Add to Reading ListSource URL: www.eas.slu.eduLanguage: English - Date: 2013-06-07 21:37:03
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996 | Add to Reading ListSource URL: www.ngs.noaa.govLanguage: English - Date: 2009-11-03 13:58:34
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997 | Add to Reading ListSource URL: geodesy.noaa.govLanguage: English - Date: 2009-11-03 13:58:34
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998 | Add to Reading ListSource URL: www.sofia.usra.eduLanguage: English - Date: 2011-07-13 13:20:01
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999 | Add to Reading ListSource URL: sciencefriday.comLanguage: English - Date: 2014-07-11 13:59:40
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1000 | Add to Reading ListSource URL: www.aps.orgLanguage: English - Date: 2007-01-18 18:16:50
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