000 00295nam a22001217a 4500
020 _a0-273-02178-8
082 _a621.382 RON'I
100 _aRONAYNE, JOHN
_965516
245 _aINTRODUCTION TO DIGITAL COMMUNICATION SWITCHING
260 _aLONDON
_bPITMAN
_c1986
300 _a212P
942 _cBK
999 _c573699
_d573699