201 | Add to Reading ListSource URL: tf.boulder.nist.govLanguage: English - Date: 2007-02-09 10:14:01
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202 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2013-03-12 09:43:21
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203 | Add to Reading ListSource URL: authors.library.caltech.eduLanguage: English - Date: 2014-07-23 18:54:27
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204 | Add to Reading ListSource URL: www.ptb.deLanguage: English - Date: 2013-02-28 08:51:58
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205 | Add to Reading ListSource URL: www.ucl.ac.ukLanguage: English - Date: 2013-08-05 13:11:12
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206 | Add to Reading ListSource URL: www.euramet.orgLanguage: English - Date: 2010-06-22 05:05:43
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207 | Add to Reading ListSource URL: www.ptb.deLanguage: English - Date: 2014-03-04 09:17:39
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208 | Add to Reading ListSource URL: www.ptb.deLanguage: English - Date: 2013-09-20 05:42:51
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209 | Add to Reading ListSource URL: www.ptb.deLanguage: English - Date: 2013-08-19 05:22:12
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210 | Add to Reading ListSource URL: www.ptb.deLanguage: English - Date: 2012-05-09 02:31:16
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