00251nam a2200109Ia 4500008004100000041001200041082001100053100001700064245004800081260000600129650000600135221030s9999    xx            000 0 und d  aEnglish  a105.23  aD. P. Nagpal 0aComputer Science `O` Levelcby D. P. Nagpal  c0  aB