00391nam a2200121 a 450000500170000002000150001708200190003210000410005124500790009226000360017130000200020749000420022720251203091722.0  a0201544199  a004.6,bD, HAR  aHarrison, Peter G., Patel, Naresh M.  aPerformance modelling an communication networks and computer architectures  aWokinghambAddison Wesleyc1993  axiii,472p, 22cm  aInternational computer science series