Yellow book. Vol. 8.3, Data communication networks. Transmission, signalling and switching, network aspects, maintenance, administrative arrangements. Recommendations X.40-X.180

International telegraph and telephone consultative committee. Plenary assembly (7 : Genève : 1980)

International Telecommunication Union (medarbetare)

Alternativt namn: ITU

Alternativt namn: UIT

Alternativt namn: Union internationale des télécommunications

ISBN 92-61-01171-3

Geneva : International telecommunication union, 1981

Engelska 273 s.

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