Introduction to telephones and telephone systems/

Eitemau Tebyg

• Introduction to telephone switching
  gan: 355070 Briley, Bruce E.
• Improvements in telephone signalling /
  gan: 272820 Welch, S.
  Cyhoeddwyd: (1949)
• The British telephone system : system effectiveness /
  gan: Open University. Systems Behaviour Course Team, et al.
  Cyhoeddwyd: (1973)
• The telephone and the exchange /
  gan: 462982 Povey, P J
  Cyhoeddwyd: (1979)
• Electronic Telephone Projects /
  gan: Caristi, Anthony J., author 364284
  Cyhoeddwyd: (1986)