00323nam a2200121Ia 4500008004100000020001900041082001800060100002000078245003600098260003400134300001100168650002200179240817s9999    xx            000 0 und d  a 0-07-451582-9  a001.6425 D1,i  aDhamdhere, D.M. 0aIntroduction to system software  c1989a New Yorkb McGraw hill  a400 p.  a computer science