查詢 text:United States. Department of Commerce. Office of Telecommunications. ，共 1 筆
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27 0 0 0 0A review of selected activities in the Office of Telecommunications, Department of Commerce :a report
- 作者: National Research Council (U.S.)
- 出版: Washington, D.C. : National Academy of Sciences 1978.
- 資料類型: 電子書