World Communications Year : development of communications infrastructure : report of the Secretary-General of the International Telecommunication Union on the state of preparations for a World Communications Year.
1981
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详细记录
符号E/1981/70/Add.2
标题World Communications Year : development of communications infrastructure : report of the Secretary-General of the International Telecommunication Union on the state of preparations for a World Communications Year.
日期New York : UN, 31 July 1981.
描述
[17] p., including annexes : tables.