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thetimetre-gramme-sedC.G.S.systemofunits.TaylorandFrancis.1875:83. Pearce,J.A.TheVariabilityoftheRotationoftheEarth.JournaloftheRoyalAstronomicalSocietyofada.1928,22:145–147.Bibcode:1928JRASC..22..145P. Seidelmann,P.Keh编.ExpnatorySupplementtotheAstronomicalAlmanac.MillValley,California:UySceBooks.1992:79–80.ISBN0-935702-68-7.原始内容存档於2017-11-14. LeapSeds.TimeServiceDepartment,UatesNavalObservatory.[2008-12-27].原始内容存档於2012-02-07. WmMarkowitz1988''''parisoSor,ETLunar,UTandTDT'''',ineds.AKBabcock&GAWilkins,''''TheEarth''''sRotationandReferenceFramesfeodesyandGeophysics'''',IAUSymposia#1281988,atpp413–418. DDMcCarthyandAKBabcock1986,"TheLengthoftheDaySince16