000 002940000a22001090004500
245 _aPABX purchase and installation : a practical handbook for manager
100 _aRodgers, Derek
260 _aLondon
_bTelecommunications Press
_c1985
080 _a621.395
_bR6
041 _aEN
942 _cBK
999 _c117506
_d117506