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ITU-R S.1428-1 Reference FSS...
ITU-R TF.767-2 Use of global navigation satellite systems for high-accuracy time transfer
ITU-T T.82 Corrigendum 2 T.82 (1993) Technical Cor. 2
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ITU-T X.790 Corrigendum 2 X.790 (1995) Corrigendum 2
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