Telephony and telegraphy : an introduction to instruments and switching systems (Electromechanical and reed-electronic) /

Telephony and telegraphy : an introduction to instruments and switching systems (Electromechanical and reed-electronic) /

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Detalles Bibliográficos
Autor principal:	400952 Smith, Sydney F.
Formato:
Publicado:	Oxford : Oxford University Pr., 1978
Materias:	Telephone Telegraph