00270nam a2200109Ia 4500008004100000041000800041082001500049100002200064245002300086260004300109300000800152231228s1989    xx            000 0 und d  aeng  a5.446bKOT  aKOTECHA (Harshad)  aDOS for Beginner`s  aNew DelhibSigma Press New Delhic1989  a188