00330nam a2200121Ia 4500008004100000082002400041100002100065245004000086250000900126260000900135300000600144650005800150150614s9999    xx            000 0 und d  a621.38041  FIT-F  R  aJerry Fitzgerald  aFundamentals of Data Communications  aI ED  c1978  a0  aFundamentals of Data Communications  Jerry Fitzgerald