Schindler, G. E. (1982). A History of engineering and science in the bell system: Switching technology ( 1925-1975 ). United States of American: Bell Telephone Laboratories, Inc.
Dyfyniad Arddull ChicagoSchindler, G. E. A History of Engineering and Science in the Bell System: Switching Technology ( 1925-1975 ). United States of American: Bell Telephone Laboratories, Inc, 1982.
Dyfyniad MLASchindler, G. E. A History of Engineering and Science in the Bell System: Switching Technology ( 1925-1975 ). United States of American: Bell Telephone Laboratories, Inc, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.