00259nam a2200109Ia 4500008004100000041001200041082001100053100001900064245005400083260000600137650000600143221030s9999    xx            000 0 und d  aEnglish  a105.23  aT. C. Upadhyay 0aIntroduction to Modern Physicscby T. C. Upadhyay  c0  aB