向井暉二 編著電気通信協会1980.6<ND386-228>
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向井暉二編著電気通信協会1989.3
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Volumes of this title電気評論社[1967]-2022<Z16-669>
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Volumes of this title日本電信電話公社施設局 編電気通信協会1949-1985<Z16-296>
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