00253nam a2200109Ia 4500008004100000041001200041082001100053100002200064245004500086260000600131650000600137221030s9999    xx            000 0 und d  aEnglish  a105.23  aRussel A . Stultz 0aLearn DOS in a Daycby Russel A . Stultz  c0  aB