Handbook for wireless telegraph operators, working installations licensed by His Majesty's postmaster-general :

revised in accordance with the radiotelegraph convention of London, 1912.
Bibliographic Details
Main Creator: Great Britain. Post Office.
Format: Book
Language:English
Published / Created: London : J. Causton & Sons, Ltd., 1916.
Subjects:
Notes:Physical description: 32 l. ; 25 cm.
Contained in: Pamphlet volume BB7774