Radio for signals and their use in navigation in connection with the radio-compass
By: by George R. Putnam, commissioner of lighthouses.
Contributors: Putnam, G. R. b. 1865.
Edition: 2d ed.: 1924.
Publisher: Govt. print. off.
Published: 1924
Place of publication: Washington
Language: eng
Number of pages: 28
Subjects: Fog-signals.; Telegraph, Wireless.
Notes: Bibliography: p. 27-28.
At head of title: Department of commerce. Lighthouse service.