000 00259nam a2200097Ia 4500
008 150310s9999 xx 000 0 und d
100 _aJOHN RONAYNE
245 _aINTRODUCTION TO DIGITAL COMMUNICATION SWITCHING
250 _a2
260 _c1992
_bWHEELER PUBLISHER
999 _c21122
_d21122