Multiplex telephony and telegraphy, by means of electric waves guided by wires. By George O. Squier.

By: Contributor(s): Material type: TextTextSeries: Professional paper of the Signal Corps, U.S. ArmyPublication details: Washington, Govt. Print. Off., 1911.Description: 102 p. illus., diagrs. 23 cmSubject(s): LOC classification:
  • TK6421 .S8
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On verso of t.-p.: War Department. Document no. 390.

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