000 00322nam a2200121Ia 4500
008 220201s1992 xx 000 0 eng d
041 _aENG
100 _aI.S: 3515-1966
245 0 _aTELECOMMUNICATION SWITCHING AND NETWORK
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1992
300 _a583
942 _2ddc
999 _c57894
_d57894