000 00248nam a2200097Ia 4500
008 220201s1987 xx 000 0 eng d
100 _aTALLEY (DAVID)
245 0 _aBASIC CARRIER TELEPHONY
260 _bCBS PUB. & DIST. NEW DELHI
_c1987
942 _2ddc
999 _c96070
_d96070