Author: Mitchell, Jay Gordon
Title: Principles and Practice of Telephony... [in Five Volumes]
Description: New York, McGraw-Hill book company, 1923. Hardcover. 5 vols. illus. diagrs. 20 cm. Very good condition Contents: -Principles and apparatus.-Circuit elements and power plants.-Toll equipment, traffic and trunking.-Circuit refinements and mechanical switching.-Mechanical manual switching.

Keywords: Telephone


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