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050 0 0 _aTK6161
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082 0 0 _a621.38
084 _a621.38
_bST
100 1 _aSmith, Sydney F.
245 1 0 _aTelephony & telegraphy A:
_h[Book :]
_ban introduction to telephone and telegraph instruments and exchanges, /
_cby Sydney F. Smith.
250 _a1st.ed.
260 _aLondon, :
_bOxford U.P.,
_c1969.
300 _axv, 285 p. :
_billus. ;
_c25 cm.
350 _a42/-
500 _aThird ed. published in 1978 under title: Telephony and telegraphy.
504 _aBibliography: p. [263].
521 _aAll age.
650 0 _aTelephone.
650 0 _aTelegraph.
906 _a7
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