00281nam a2200121Ia 4500008004100000020001500041041000800056082001100064100001900075245001900094260003800113300000800151211209s1986    xx            000 0 und d  a8170291070  aeng  a005.44  aPRATA, STEPHEN  aADVANCED UNIX   aNEW DELHIbBPB PUBLICATIONSc1986  a484