000 00382nam a2200157Ia 4500
100 _aSMITH J R G
020 _a0-340-04619-8
650 _aTelecommunication
365 _cRS
365 _d1
942 _cENGBK
654 _aTelecommunication system
245 _aElementary Telecommunication Practice
260 _bEnglish Language Book Society
_c1967
_aLondon
300 _a319p
999 _c15052
_d15052