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1.

図書
図書
1. Frontiers in info-communications research
[edited by] Communications Research Laboratory, Ministry of Posts and Telecommunications
出版情報: [Tokyo] : Communications Research Laboratory, [2000]
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2.

図書
図書
2. Information network system : telecommunications in the twenty-first century
Yasusada Kitahara
出版情報: Tokyo : Telecommunications Association, c1982
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