A history of engineering and science in the Bell system : switching technology (1925-1975) / prepared by A.E. Joel Jr... [et al ] : G.E. Schindler Jr., Editor. - - New Jersey: Bell Telephone Laboratories,Inc, 1982 - xiv,639 p. : ill.,diars.,photos. graphs.

Includes bibliographies

0932764029


Telephone systems .
Telephone,automatic.
Bell Telephone, automatic,Incorporated

TK6397 / H58