000 00307nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a621.38 H647
100 _aHILLS.M.T
245 0 _aTELECOMMUNICATION SWITCHING PRINCIPLES
260 _aLONDON
_bAllen & Unwin
_c1979
300 _a24X16
942 _cBK
_2DDC
999 _c17800
_d17800