000 00309nam a2200121Ia 4500
999 _c16393
_d16393
008 190711s9999 xx 000 0 und d
082 _a621.385 D229
100 _aDas, P, N.
245 0 _aIntroduction to Automatic Telephony
260 _aCALCUTTA
_bModern Book Agency
_c1969
300 _a22X14
942 _cBK