000 00323nam a2200133Ia 4500
008 220201s1987 xx 000 0 eng d
041 _aENG
100 _aI.S:816-1969
245 0 _aBASIC CASSES TELEPHONY
250 _a3RD
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1987
300 _a218
942 _2ddc
999 _c57344
_d57344