A History of engineering and science in the Bell System /
A History of engineering and science in the Bell System /
prepared by members of the technical staff, Bell Telephone Laboratories ; M.D. Fagen, editor.
- [New York] : The Laboratories, 1975-
- v. <1-7 > : ill. ; 25 cm.
Vol. 3 prepared by A.E. Joel, Jr. and other members of the technical staff, Bell Telephone Laboratories; G.E. Schindler, Jr., editor.