Review of the electrical communication laboratories.
Nihon Denshin Denwa Kōsha.Musashino Denki Tsūshin Kenkyūjo.
Nihon Denshin Denwa Kabushiki Kaisha.Kenkyū Kaihatsu Honbu.
Musashino-shi, Tokyo, Japan : Musashino Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corp.,
c1971-89.
Title from cover.
Published: Research and Development Headquarters, Nippon Telegraph and Telephone Corp., 
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Review of the Electrical Communication Laboratory
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