Engineering and operations in the Bell System /
Engineering and operations in the Bell System /
prepared by members of the technical staff and the Technical Publication Department, Bell Laboratories
- xviii, 721 pages : illustrations (some folded) maps ; 25 cm
Includes index.
Includes bibliographical references.
Telecommunication--United States.
Telephone--United States.
Includes index.
Includes bibliographical references.
Telecommunication--United States.
Telephone--United States.