Telegraphy
Subtitle: a detailed exposition of the telegraph system of the British post office
By: by T.E. Herbert.
Edition: 4th ed. (with addendum) with 640 illustrations.
Publisher: Sir I. Pitman & Sons, Ltd.
Published: 1920
Place of publication: London; New York [etc.]
Language: eng
Number of pages: 1019
Subjects: Telegraph.; Postal service -- Great Britain.
Notes: Lettered on cover: The specialists' series.