Radio publications of the Bureau of Standards
Edition: Revised January 4, 1928.
Series: Letter circular -- 40; Letter circular (United States. Bureau of Standards) -- 40
Publisher: U.S. Dept. of Commerce, Bureau of Standards
Published: 1928
Place of publication: Washington, D.C
Language: eng
Number of pages: 17
Subjects: Bibliography; Radio; United States. Bureau of Standards