United States Army. Signal Corps. creator United States National Bureau of Standards. text dcu Washington Govt. Print. Off. 1923 monographic eng

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v, 51 p. illus., diagrs. 23 cm. prepared for the Office of the chief signal officer, January, 1923. On verso of t.-p.: War department. Document no. 1114. Office of the adjutant general. "Prepared under the direction of the chief signal officer with the cooperation of the Bureau of Standards." Telegraph, Wireless Radio TK5707 .U6 no. 41 war23000016 U.S. Army War College 850823 20260227112812.0 war23000016