Automatic telephony
Subtitle: a comprehensive treatise on automatic and semi-automatic systems
By: by Arthur Bessey Smith and Wilson Lee Campbell.
Contributors: Campbell, Wilson Lee.
Edition: 1st ed.
Publisher: McGraw-Hill
Published: 1914
Place of publication: New York
Language: eng
Number of pages: 407
Subjects: Telephone, Automatic; Telephone; Automatic intercept system; Telephone switching systems, Electronic