000 00324nam a2200133Ia 4500
008 220201s1993 xx 000 0 eng d
082 _a621.382
_bDAS
100 _aDas, P N
245 0 _aIntroduction to automatic telephony
250 _a9
260 _aNew Delhi
_bModern Book Agancy
_c1993
300 _a272
942 _2ddc
999 _c26289
_d26289