00337nam a2200121Ia 4500008004100000041000800041082001400049100001500063245004900078260005400127300001300181999002100194231228s1994    xx            000 0 und d  aeng  a6.21bNOR  aNORTON (P)  aPeter Nortons Dos Guide Revised and Expanded  aNew DelhibPrentice Hall of India New Delhic1994  aXVI, 349  c1079977d1079977