00249nam a2200109Ia 4500008004100000041001200041082001100053100002200064245004100086260000600127650000600133221030s9999    xx            000 0 und d  aEnglish  a105.23  aR. B. V. Narayana 0aModern Physicscby R. B. V. Narayana  c0  aB