Smith, Sydney F., author
Telephony and telegraphy : and introduction to instruments and switching systems (electromechanical and reed-electronic)
Oxford University Press, 1978
 Buku Teks
Electronic switching : digital central office systems of the world / edited by Amos E. Joel, Jr.
IEEE Press : Sole Worldwide distributor, J. Wiley, 1982
 Buku Teks
Hobbs, Marvin
Modern communications switching systems / by Marvin Hobbs
Tab Books, 1981
 Buku Teks
Motor-uniselectors with noble-metal contacts in telephone switching systems / by Richard Krause
Van Nostrand Reinhold , 1970
 Buku Teks
Syed Riffat Ali
Digital switching systems: system reliability and analysis/Syed Riffat Ali
McGraw-Hill, 1997
 Buku Teks
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