000 00277nam a2200121Ia 4500
008 160710s1990 xx 000 0 und d
082 _a621.38415 BLA
100 _aBKACKWELL
245 _aINTEGRATED PBX SYSTEM
260 _bBLACKWELL
_c1990
300 _a303
942 _2ddc
_cB
999 _c52013
_d52013