000 00251nam a2200109Ia 4500
008 220630s9999 xx 000 0 und d
020 _a853406774
082 _aJ 384 BAR
100 _aBarnes M J
_9127284
245 0 _aTelecommunications
942 _cBK
_w561
_xJohn Tresidder
_y561
_zJohn Tresidder
999 _c691773
_d691772