Cyclopedia of telephony and telegraphy
Subtitle: a general reference work
By: Prepared by a corps of telephone and telegraph experts, and electrical engineers of the highest professional standing; illustrated with over two thousand engravings
Publisher: American technical society
Published: 1911
Place of publication: Chicago
Language: eng
Subjects: Telephone; Telegraph
Notes: v. 1. Principles; sub-stations; party-line; systems; protection.--v. 2. Manual switchboards; automatic systems; power plants.--v. 3. Construction; engineering; maintenance; measuremens; batteries.--v. 4. Telegraphy, wireless; transmission; electricity; index.

"Authorities consulted" at beginning of each volume.