000 00439nam a22001577a 4500
005 20220518143317.0
008 100714t xxu||||| |||| 00| 0 eng d
020 _a0273026771
082 _a621.382
_bRON
100 _aRonayne,John
245 _aThe integrated services digital network from concept to applications
260 _aLondon
_bPitman Publication
_c1987
300 _avi,230p.
653 _aISDN - computer networks
942 _cBK
999 _c223660
_d223660