00357nam a2200145Ia 4500008004100000020001500041041000800056082001600064100001900080245004100099250000600140260003900146300001700185650000900202210716s1990    xx            000 0 und d  a8177587706  aeng  a005.43 BACM  aBach, Maurice.  aDesign of the unix operating system.  a1  aNew DelhibPearson Educationc1990  axiv,471/2015  aUnix