000 00304nam a2200121Ia 4500
008 160710s1950 xx 000 0 und d
082 _a621.38 REN
100 _aRENTON,R.N.
245 _aTELECOMMUNICATIONS PRINCIPLES
260 _bSIR ISAAC PITMAN & SONS, LTD.
_c1950
300 _a446
942 _2ddc
_cB
999 _c21415
_d21415