000 00250nam a2200121Ia 4500
082 _a621.385 BEL
100 _aBELLAMY, J.C.
245 _aDIGITAL TELEPHONY
250 _a3
260 _bJOHN WILEY AND SONS
_c2003
300 _a643
942 _2ddc
_cB
999 _c59425
_d59425