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024 _a71712
037 _cTextual
040 _aCSL
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041 _aeng
082 _aD666:4, J7.1
100 _aHarbottle H R
245 0 _aPrinciples of telecommunications engineering
260 _c1957
300 _ap.
_ccm.
650 _aElectrical communication
700 _a Hanman B L G
942 _hD666:4, J7.1
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999 _c35114
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