000 00286nam a2200121Ia 4500
008 160710s1947 xx 000 0 und d
082 _a621.385 H60T
100 _aHERBERT,T.E.
245 _aTELEPHONY
260 _bSIR ISAAC PITMAN & SONS, LTD.
_c1947
300 _a97
942 _2ddc
_cB
999 _c10259
_d10259