000 00301nam a2200121Ia 4500
008 220201s1987 xx 000 0 eng d
041 _aENG
100 _aTALLEY, D
245 0 _aBASIC CARRIER TELEPHONY
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1987
300 _a218
942 _2ddc
999 _c60731
_d60731