Author: AITREN (William)

Description

EPOSffORV AITREN (William), ._I.E.E. Autoniat.io telephone srstezñs, etc. 3 vo].s. Illustrations, diaPams and?ldod plates. 8°. Londpii, l92l—. 1. Cirouits and apparatus as used in the public ?ervices. 2. Auxiliary services and private branch exchanges. 3. Large multi—office automatic systems, semi—automatic working, niisoellaneous systems, lay—otit and wiring, power plant, traffic.

Card ID: 125