000 00254nam a22001097a 4500
082 _a621.382 SMI'E
100 _aSMITH, J. R. C
_957231
245 _aELEMENTARY TELECOMMUNICATION PRACTICE
260 _aLONDON
_bELBS
_c1965
300 _a319P
942 _cBK
999 _c567523
_d567523