151 | Add to Reading ListSource URL: www.leapsecond.comLanguage: English - Date: 2003-06-19 13:24:43
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152 | Add to Reading ListSource URL: www.npu.eduLanguage: English - Date: 2006-11-13 20:00:43
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153 | Add to Reading ListSource URL: www.navcen.uscg.govLanguage: English - Date: 2009-01-27 13:51:38
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154 | Add to Reading ListSource URL: www.navcen.uscg.govLanguage: English - Date: 2010-07-16 08:07:49
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155 | Add to Reading ListSource URL: www.navcen.uscg.govLanguage: English - Date: 2010-09-16 10:04:44
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156 | Add to Reading ListSource URL: trl.trimble.comLanguage: English |
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157 | Add to Reading ListSource URL: www.faa.govLanguage: English - Date: 2007-05-22 15:05:47
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158 | Add to Reading ListSource URL: aerospace.orgLanguage: English |
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