00324nam a2200121Ia 4500008004100000020001800041041000800059082001500067100002100082245004500103260004000148300001400188220530s9999    xx            000 0 und d  a9788120305168  aeng  a5.133bBAC  aBach, Maurice J.  aThe Design of the Unix Operating Systems  aHaryanabPHI Learning Pvt ltdc2013  a471 PbPB