00250nam a2200109Ia 4500008004100000041001200041082001100053100001600064245004800080260000600128650000600134221030s9999    xx            000 0 und d  aEnglish  a105.23  aC. L. Arora 0aWaves, Vibrations and Soundcby C. L. Arora  c0  aB