000 00277nam a2200109Ia 45e0
008 181001s1943 xx 000 0 und d
100 _aAlbert A.L.
245 0 _aFundamentals of telephony
260 _aN.Y.
_bMcGraw Hill
_c1943
300 _a374
942 _2ddc
_cBK
999 _c1412
_d1412