1 | Add to Reading ListSource URL: tf.nist.govLanguage: English - Date: 2002-10-09 11:53:32
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2 | Add to Reading ListSource URL: www.bipm.orgLanguage: English - Date: 2014-06-23 05:06:25
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3 | Add to Reading ListSource URL: www.mhlw.go.jpLanguage: English - Date: 2012-06-07 20:57:05
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4 | Add to Reading ListSource URL: www.ptfinc.comLanguage: English - Date: 2014-01-22 12:48:38
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5 | Add to Reading ListSource URL: resource.npl.co.ukLanguage: English - Date: 2005-04-29 05:48:49
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6 | Add to Reading ListSource URL: www.leapsecond.comLanguage: English - Date: 2005-01-26 14:37:02
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