The principles underlying radio communication.
Contributors: Ould, Richard Sheldon, 1889-; United States. Army. Signal Corps.
Edition: (2d ed.) ... Rev. to May 24, 1921.
Series: United States. Army. Signal Corps. Radio communication pamphlet -- no. 40
Publisher: Govt. Print. Off.
Published: 1922
Place of publication: Washington
Subjects: Telegraph, Wireless.; Radio.