The Post Office Electrical Engineers' Journal

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See also

References

  1. The Post Office Electrical Engineers' Journal, Vol. 38 No. 4, January 1946
  2. The Post Office Electrical Engineers' Journal, Vol. 49 No. 4, January 1957
  3. The Post Office Electrical Engineers' Journal, Vol. 51 No. 4, January 1959
  4. How the Secret Telephone War Came to Britain. Sunday Times, October 15th 1972.