31 | Add to Reading ListSource URL: www.aps.anl.govLanguage: English - Date: 1998-07-13 15:25:10
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32 | Add to Reading ListSource URL: physics.nist.govLanguage: English - Date: 2011-12-23 14:39:59
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33 | Add to Reading ListSource URL: www.ngs.noaa.govLanguage: English - Date: 2013-01-10 08:53:07
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34 | Add to Reading ListSource URL: www.ngs.noaa.govLanguage: English - Date: 2013-01-10 08:53:19
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35 | Add to Reading ListSource URL: tf.nist.govLanguage: English - Date: 2001-10-02 11:11:06
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36 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2010-08-19 16:31:45
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37 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2014-02-05 14:49:31
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38 | Add to Reading ListSource URL: unstats.un.orgLanguage: English - Date: 2014-04-21 09:14:52
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39 | Add to Reading ListSource URL: www.doe.virginia.govLanguage: English - Date: 2011-08-03 15:02:55
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40 | Add to Reading ListSource URL: unstats.un.orgLanguage: English - Date: 2013-05-30 14:05:06
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