Yellow book
By: CCITT, International Telegraph and Telephone Committee.
Contributors: International Telecommunication Union.; CCITT Plenary Assembly (7th : 1980 : Geneva, Switzerland)
Publisher: International Telecommunication Union
Published: 1981
Place of publication: Geneva
Language: eng
Subjects: Telephone -- Congresses; Telegraph -- Congresses; Telecommunication -- Data processing -- Congresses; Telecommunication -- International cooperation -- Congresses
Notes: "CCITT VIIth Plenary Assembly, Geneva, 10-21 November 1980."

Includes bibliographies.

Errata slip inserted.