00315nam a2200109Ia 4500008004100000022001700041040002500058082001200083100002500095245004600120260003900166240215s9999    xx            000 0 und d  a0-675-212723  aNORSU-DumcNORSU-Dum  a004/Sz9  aSzymanski, Robert A. 0aIntro. To Computer and Information System  bMacmillan Publishers Companyc1991