Modern practice of the electric telegraph.
Subtitle: A handbook for electricians and operators.
By: By Frank L. Pope. 
Edition: 6th ed., rev. and enl. 
Publisher: D. Van Nostrand
Published: 1872
Place of publication: New York
Language: eng
Number of pages: 160
Subjects: Telegraph -- Operators' manuals.
Genres: Operators' manuals.