Atkinson, J. Telephony: : a detailed exposition of the telephone exchange systems of the british post office.
Παραπομπή Chicago StyleAtkinson, J. Telephony: : A Detailed Exposition of the Telephone Exchange Systems of the British Post Office.
Παραπομπή MLAAtkinson, J. Telephony: : A Detailed Exposition of the Telephone Exchange Systems of the British Post Office.
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