000 00325nam a2200109Ia 45e0
008 181001s1963 xx 000 0 und d
100 _aDas P.N.
245 3 _aAn intro. To automatic Telephony
260 _aCalcutta
_bModern B. Agency
_c1963
300 _a222
942 _2ddc
_cBK
999 _c810
_d810