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  Home : ITU-T : Publications : Recommendations : X Series : X.21 : X.21 (1988) Corrigendum 1 (07/89)
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Recommendation X.21 (1988) Corrigendum 1 (07/89)

Approved in 1989-07-13

Status : Superseded

Cor.1 to X.3 (1988), X.21 (1988), X.25 (1988), X.28 (1988), I.461/X.30 (1988), I.462/X.31 (1988) and X.32 (1988) were published in a common covering note in June 1990

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